{"product_id":"hobbywing-seaking-90a-v4-brushless-rc-boat-esc","title":"Hobbywing SEAKING 90A V4 2-4S Waterproof Brushless Marine ESC","description":"\u003cstyle\u003e\n.cnhl-esc-content {\n  line-height: 1.7;\n  color: #222;\n}\n\n.cnhl-esc-content h2 {\n  font-size:18px;\n  font-weight:700;\n  margin:24px 0 10px;\n  color:#000;\n  border-bottom:1px solid #eee;\n  padding-bottom:6px;\n}\n\n.cnhl-esc-content h3 {\n  font-size:15px;\n  font-weight:bold;\n  margin:14px 0 8px;\n  color:#000;\n}\n\n.cnhl-esc-table-wrap {\n  width:100%;\n  overflow-x:auto;\n  -webkit-overflow-scrolling:touch;\n  margin:14px 0 20px;\n}\n\n.cnhl-esc-table {\n  width:100%;\n  min-width:620px;\n  border-collapse:collapse;\n  font-size:14px;\n  line-height:1.5;\n}\n\n.cnhl-esc-table th,\n.cnhl-esc-table td {\n  padding:10px 12px;\n  border:1px solid #ddd;\n  text-align:left;\n  vertical-align:top;\n}\n\n.cnhl-esc-table th {\n  width:34%;\n  background:#E60073;\n  color:#fff;\n  font-weight:700;\n}\n\n.cnhl-esc-table td {\n  background:#f2f2f2;\n}\n\n.cnhl-fit-box {\n  background:#f7f7f7;\n  padding:14px 16px;\n  margin:16px 0;\n  border-left:4px solid #E60073;\n  font-size:14px;\n  line-height:1.65;\n}\n\n.cnhl-img {\n  margin:20px 0;\n  text-align:left;\n}\n\n.cnhl-img img {\n  width:auto;\n  height:auto;\n  max-width:100%;\n  display:block;\n}\n\n.cnhl-esc-link {\n  color:#E60073;\n  text-decoration:underline;\n}\n\u003c\/style\u003e\n\n\u003cdiv style=\"font-family:Arial,Helvetica,sans-serif;color:#333;font-size:15px;line-height:1.75;\"\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe \u003cstrong\u003eHobbywing SEAKING 90A V4 Brushless Marine ESC\u003c\/strong\u003e is a high-performance, water-cooled electronic speed controller designed for RC boats running 2S to 4S LiPo batteries. With a 90A continuous current rating, 360A peak output and an IP67 waterproof design, it provides the power-handling capability and programmable control needed for more demanding brushless marine setups.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 16px;\"\u003eStepping up from the SeaKing 60A V4, the \u003cstrong\u003eSeaKing 90A V4 ESC\u003c\/strong\u003e adds 4S LiPo support, an 8A switch-mode BEC with adjustable 6V\/7.4V\/8.4V output, dedicated capacitor overheating protection and larger 12AWG power wiring. Combined with adjustable Freewheeling, AUX channel control and optional HW LINK data monitoring, it offers a flexible solution for RC boat builds requiring increased current capacity and more advanced power management.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#fff7fb;border-left:4px solid #E60073;padding:14px 16px;margin:18px 0;\"\u003e\n\u003cstrong style=\"color:#111;\"\u003eQuick Fit Check\u003c\/strong\u003e\n\u003cul style=\"margin:8px 0 0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Brushless RC boats up to 80cm in length.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery:\u003c\/strong\u003e 2S–4S LiPo (7.4V–14.8V nominal).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor:\u003c\/strong\u003e Single sensorless brushless marine motor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent Rating:\u003c\/strong\u003e 90A continuous \/ 360A peak.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBEC:\u003c\/strong\u003e Adjustable 6V \/ 7.4V \/ 8.4V, rated at 8A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWaterproof:\u003c\/strong\u003e IP67 with integrated water cooling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor Connectors:\u003c\/strong\u003e 4.0mm gold female bullet connectors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Connector:\u003c\/strong\u003e Not preinstalled; soldering required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size:13px;line-height:1.65;margin:9px 0 0;color:#666;\"\u003eCheck motor current draw, propeller load, water-cooling capacity, battery discharge capability and installation space before use. The 80cm boat-length recommendation is a manufacturer guideline rather than a guaranteed fitment limit.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eHobbywing SEAKING 90A V4 Specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:separate;border-spacing:0 8px!important;font-size:14px;line-height:1.5;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:39%;background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eBrand \/ Series\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eHobbywing SEAKING V4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eSEAKING 90A V4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eProduct Number \/ SKU\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e30302362\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eESC Type\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eBrushless \/ Sensorless \/ Marine ESC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eContinuous \/ Peak Current\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e90A \/ 360A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eInput Voltage\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e2–4S LiPo (7.4–14.8V nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eBuilt-in BEC\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eSwitch-mode, 6V \/ 7.4V \/ 8.4V adjustable, 8A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eWaterproof Rating\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eIP67\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eCooling System\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eIntegrated water cooling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eCooling Pipe Diameter\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e3.0mm inner \/ 5.5mm outer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eDimensions (L × W × H)\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e60 × 36.3 × 22.5mm (excluding water-cooling pipe)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e115.6g (including wires and output connectors)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eBattery Input Wires\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e12AWG red × 150mm \/ 12AWG black × 150mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eMotor Output Wires\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e3 × 12AWG black, 100mm each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eBattery Input Connector\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eNone (connector installation required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eMotor Output Connectors\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e4.0mm gold female bullet connectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eFreewheeling\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eSupported, enable \/ disable selectable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eCapacitor Overheating Protection\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eSupported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eESC Programming\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eLED Program Box, LCD G2, LCD Pro, OTA Programmer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eProgramming Connection\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eThrottle signal cable + yellow signal cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003ePeak Data Recording\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eSupported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eReal-Time Monitoring\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eSupported with compatible external OTA module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eHistorical Graph Recording\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eExternal OTA supported; independent built-in historical graph recording not supported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eFirmware Upgrade\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eSupported with compatible programming hardware\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eRecommended Boat Length\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e≤80cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eKey Features of the SEAKING 90A V4\u003c\/h2\u003e\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:20px 0 8px;\"\u003e90A Continuous Power with 4S LiPo Support\u003c\/h3\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe SEAKING 90A V4 expands the available operating range beyond the 2S–3S limits of the smaller SeaKing 30A and 60A V4 models. Supporting \u003cstrong\u003e2S, 3S and 4S LiPo batteries\u003c\/strong\u003e, it gives RC boat builders greater flexibility when matching battery voltage to brushless motor requirements.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eIts 90A continuous current rating and 360A peak rating provide increased power-handling capability for appropriately configured marine propulsion systems. The 4S capability is particularly important when upgrading from a 3S setup to a compatible higher-voltage brushless motor and battery combination.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eHigher voltage does not automatically mean higher performance in every boat. Motor KV, propeller diameter, pitch, hull resistance and cooling efficiency all influence the actual current draw. The motor should be evaluated under operating load, and the 360A peak figure should not be treated as a continuous current rating.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:22px 0 8px;\"\u003eIP67 Waterproof Construction with Water Cooling\u003c\/h3\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eDesigned for the wet operating environment of RC boats, the SeaKing 90A V4 features an IP67-rated waterproof and dustproof construction. This helps protect the internal electronics from water exposure under the manufacturer's specified conditions.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eAn integrated water-cooling system provides heat transfer during operation. The cooling pipe connections measure \u003cstrong\u003e3.0mm inner diameter and 5.5mm outer diameter\u003c\/strong\u003e, making them larger than those used on the 30A and 60A V4 models.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eA properly functioning cooling circuit is especially important during sustained high-current operation. Confirm that the water inlet, tubing and outlet are correctly connected, and secure the hoses against loosening or leaks.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eAlthough the ESC is waterproof, exposed plugs and electrical connectors should be inspected and dried after use to help prevent corrosion. Waterproof protection can also diminish with wear, damage and aging.\u003c\/p\u003e\n\n  \n  \u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/003_eaa55e14-a613-4611-bdd6-270d77847e2c.png?v=1794378025\" alt=\"Hobbywing SeaKing 90A V4 IP67 waterproof marine ESC with integrated water cooling for RC boats\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:22px 0 8px;\"\u003e8A Adjustable BEC with Three Voltage Options\u003c\/h3\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eOne of the most important upgrades over the SeaKing 60A V4 is the higher-output switch-mode BEC. The SEAKING 90A V4 provides a rated \u003cstrong\u003e8A BEC output\u003c\/strong\u003e with three selectable voltage settings: 6V, 7.4V and 8.4V.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe 6V option is appropriate for compatible standard-voltage receivers and servos. The 7.4V and 8.4V settings allow the ESC to supply equipment specifically designed for higher-voltage operation, including suitable high-torque steering servos.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThis additional voltage flexibility is useful when building a boat with more demanding steering electronics. However, the selected BEC voltage must never exceed the maximum operating voltage of the connected receiver or servo.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#fff7fb;border-left:4px solid #E60073;padding:13px 16px;margin:16px 0;\"\u003e\n\u003cstrong style=\"color:#111;\"\u003eBEC Compatibility Reminder\u003c\/strong\u003e\n\u003cp style=\"margin:6px 0 0;\"\u003eThe three BEC voltage options are selectable settings, not simultaneous outputs. Check both voltage compatibility and current requirements of the connected radio equipment before configuration. The manufacturer's published BEC rating for the SEAKING 90A V4 is 8A.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:22px 0 8px;\"\u003eCapacitor Overheating Protection\u003c\/h3\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe SEAKING 90A V4 includes a dedicated \u003cstrong\u003ecapacitor overheating protection function\u003c\/strong\u003e, adding another layer of protection for demanding marine applications.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eExcessive electrical loading can raise temperatures within the ESC's power components, including the capacitors. This protection function monitors abnormal capacitor temperature conditions and helps reduce the risk of damage associated with overheating.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eAccording to Hobbywing's official manual, when capacitor overheating protection is triggered, ESC output is reduced to approximately 50%. Full output can be restored automatically after the temperature falls sufficiently.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThis function is a meaningful difference from the SeaKing 30A and 60A V4 models, which do not include dedicated capacitor overheating protection. It complements proper current matching and cooling rather than replacing them.\u003c\/p\u003e\n\n  \u003cdiv class=\"cnhl-img\"\u003e\n  \u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/008_6b73b234-3003-47e4-af48-9ec596d8413c.png?v=1794387112\" alt=\"Hobbywing SeaKing 90A V4 capacitor overheating protection for high-load RC boat operation\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:22px 0 8px;\"\u003eAdjustable Freewheeling for More Controlled Handling\u003c\/h3\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe SeaKing 90A V4 incorporates Hobbywing's Freewheeling function to improve motor-control behavior and operating efficiency. When enabled, Freewheeling can help reduce ESC heat generation and improve throttle linearity under comparable operating conditions.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eIt also changes how the boat responds when the throttle is released. With Freewheeling enabled, the boat can decelerate more quickly, giving the operator additional control when approaching corners or adjusting speed.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe 90A V4 allows Freewheeling to be enabled or disabled through the programming system, giving users flexibility to choose the behavior that best suits their boat and driving preferences.\u003c\/p\u003e\n\n\n  \n  \u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/009_0b921594-b7de-4cf1-9ecb-5251394c36bf.png?v=1794378389\" alt=\"Hobbywing SeaKing 90A V4 adjustable Freewheeling function for RC boat deceleration and handling\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n  \n  \n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:22px 0 8px;\"\u003eAUX Channel for Real-Time ESC Adjustment\u003c\/h3\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe additional yellow signal cable allows selected ESC parameters to be adjusted through an available receiver channel and compatible transmitter controls.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eBy assigning the AUX channel function, operators can adjust supported parameters such as maximum reverse force, acceleration punch or drag brake force using a transmitter switch or control.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThis can simplify fine-tuning when evaluating boat handling, reducing the need to repeatedly connect a programming device for every minor adjustment. The receiver must have an available channel, and the transmitter must be configured correctly.\u003c\/p\u003e\n\n  \n    \u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/010_a6c62222-06d0-41d1-8b3a-fefacb527780.png?v=1794378494\" alt=\"Hobbywing SeaKing 90A V4 AUX channel control with yellow signal wire for real-time ESC adjustments\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:22px 0 8px;\"\u003eHW LINK Data Logging and Performance Monitoring\u003c\/h3\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe SEAKING 90A V4 supports performance data monitoring through the Hobbywing HW LINK system using a compatible external OTA Bluetooth module.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eRecorded peak-value information can include minimum battery voltage, maximum current, maximum motor RPM and maximum ESC temperature. These values help operators evaluate how the propulsion system behaves under actual operating conditions.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eWith the appropriate OTA connection during operation, supported real-time measurements such as throttle position, voltage, temperature and motor speed can be monitored through the mobile app. Historical operating data can also be displayed as graphs.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThis is particularly useful when comparing different propellers, adjusting motor timing or reviewing changes to the power system, although readings should always be interpreted in the context of the actual setup and operating conditions.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Bluetooth connectivity requires an external OTA module; it is not integrated directly into the ESC. The 90A V4 does not support independent built-in historical graph recording without the appropriate external OTA arrangement.\u003c\/p\u003e\n\n    \u003cdiv class=\"cnhl-img\"\u003e\n  \u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/007_b911d0ce-1ca8-4b68-a1a2-4209c7cf305b.png?v=1794387231\" alt=\"Hobbywing SeaKing 90A V4 ESC performance data logging with HW LINK app and external OTA Bluetooth module\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:22px 0 8px;\"\u003eFirmware Updates and 11 Programmable Parameters\u003c\/h3\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe SEAKING 90A V4 supports firmware upgrades and a comprehensive range of programmable motor-control settings through compatible Hobbywing programming hardware.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eAvailable programming devices include the LED Program Box, LCD G2, LCD Pro and OTA Programmer. Firmware updating through Hobbywing software or the HW LINK mobile app requires compatible external hardware, such as a supported LCD programming box or OTA module.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eWith 11 programmable parameter categories, the ESC allows users to configure acceleration, braking, running direction, motor timing, voltage protection and other operating characteristics to suit the boat's power system.\u003c\/p\u003e\n\n\n  \n    \u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/011_b3ec2e9b-1425-476a-8259-da2c52c1286a.png?v=1794378554\" alt=\"Hobbywing SeaKing 90A V4 firmware updates using LCD programming box or external OTA programmer\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n  \n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eBattery, Motor and Connector Compatibility\u003c\/h2\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe Hobbywing SEAKING 90A V4 supports 2S–4S LiPo batteries and is designed to operate a single compatible sensorless brushless marine motor. Selecting a suitable battery requires more than matching cell count: discharge capability, connector ratings, motor current demand and propeller load must also be considered.\u003c\/p\u003e\n\n\u003ctable style=\"width:100%;border-collapse:separate;border-spacing:0 8px!important;font-size:14px;line-height:1.5;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:39%;background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003e2S LiPo\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e7.4V nominal; supported with an appropriately matched brushless marine motor.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003e3S LiPo\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e11.1V nominal; supported when the motor and propulsion system are rated for 3S operation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003e4S LiPo\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e14.8V nominal; supported for suitable 4S-rated brushless marine power systems.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003e5S \/ 6S LiPo\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eNot supported by the SEAKING 90A V4.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eMotor Type\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eSingle three-phase sensorless brushless motor.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eMotor Connection\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eThree 4.0mm gold female bullet connectors on 12AWG output wires.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eBattery Connection\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eBare 12AWG input wires; suitable battery connector must be installed.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cdiv style=\"background:#fff7fb;border-left:4px solid #E60073;padding:13px 16px;margin:16px 0;\"\u003e\n\u003cstrong style=\"color:#111;\"\u003eImportant Connector Note\u003c\/strong\u003e\n\u003cp style=\"margin:6px 0 0;\"\u003eThe SEAKING 90A V4 does not include a preinstalled battery input connector. The 12AWG red and black power leads must be fitted with a connector suitable for the battery and expected operating current. The motor output leads are equipped with 4.0mm gold female bullet connectors. Match connector sizes and polarity carefully, and ensure all solder joints are properly insulated.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eSeaKing 60A V4 vs 90A V4 vs 120A V4\u003c\/h2\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eChoosing the correct SeaKing V4 model depends on the electrical requirements of the complete propulsion system, not simply the size of the boat. The 90A V4 occupies the middle ground between the compact 60A model and the higher-current 120A V4.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;line-height:1.6;margin:12px 0 16px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background:#E60073;color:#fff;\"\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003e60A V4\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003e90A V4\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left;\"\u003e120A V4\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003eContinuous Current\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e60A\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e\u003cstrong\u003e90A\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e120A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003ePeak Current\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e200A\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e\u003cstrong\u003e360A\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e500A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003eLiPo Support\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e2–3S\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e\u003cstrong\u003e2–4S\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e2–6S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003eBEC Voltage\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e6\/7.4V\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e6\/7.4\/8.4V\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e6\/7.4\/8.4V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003eBEC Current\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e4A\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e\u003cstrong\u003e8A\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e8A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003eCapacitor Overheat Protection\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003eNo\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eYes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e64.6g\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e115.6g\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e123.5g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003eRecommended Boat Length\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e≤60cm\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e\u003cstrong\u003e≤80cm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:9px;border:1px solid #ddd;\"\u003e≤100cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong\u003eChoose the 60A V4\u003c\/strong\u003e when a compact 2S–3S system requires moderate current capacity and a smaller, lighter ESC.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong\u003eChoose the 90A V4\u003c\/strong\u003e when you need 4S LiPo compatibility, an 8A adjustable BEC and additional current-handling capability without stepping up to the larger 120A class.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong\u003eChoose the 120A V4\u003c\/strong\u003e when your motor requires higher continuous current capacity or the power system operates beyond 4S, up to the manufacturer's 6S limit.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eExplore the full range in our \u003ca href=\"https:\/\/chinahobbyline.com\/collections\/hobbywing-seaking-escs\" style=\"color:#E60073;text-decoration:underline;\"\u003eHobbywing SeaKing ESC collection\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eESC Programming and First-Time Setup\u003c\/h2\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe SEAKING 90A V4 provides 11 programmable parameter categories, allowing the operator to configure motor behavior and protection settings for the specific boat.\u003c\/p\u003e\n\n\u003cul style=\"margin:0 0 14px;padding-left:22px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eRunning Mode:\u003c\/strong\u003e Forward Only or Forward and Reverse.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Reverse Force:\u003c\/strong\u003e Adjustable reverse-throttle strength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiPo Cell Count:\u003c\/strong\u003e Automatic detection or manual 2S, 3S or 4S selection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Voltage Cutoff:\u003c\/strong\u003e Adjustable battery protection threshold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBEC Voltage:\u003c\/strong\u003e Select 6V, 7.4V or 8.4V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor Rotation:\u003c\/strong\u003e Clockwise or counterclockwise.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePunch:\u003c\/strong\u003e Seven acceleration-response levels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreewheeling:\u003c\/strong\u003e Enable or disable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrag Brake Force:\u003c\/strong\u003e Adjustable neutral-throttle braking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor Timing:\u003c\/strong\u003e Adjustable timing for compatible motor setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAUX Channel Function:\u003c\/strong\u003e Assign selected parameters for transmitter-based adjustment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:22px 0 8px;\"\u003eProgramming Connections\u003c\/h3\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe SEAKING 90A V4 supports compatible Hobbywing LED, LCD G2, LCD Pro and OTA programming devices. For the 90A model, the official programming procedure uses the throttle signal cable together with the yellow signal cable.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eWhen using a programming box, both cables must be connected according to the manufacturer's polarity and signal-position instructions. When using an OTA Programmer, follow the official Y-cable connection diagram to configure the ESC and access supported data functions.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eDo not assume the 90A V4 uses the same programming-port arrangement as the SeaKing 60A V4, which has a model-specific independent programming interface.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:22px 0 8px;\"\u003eFirst-Time Setup Checklist\u003c\/h3\u003e\n\n\u003col style=\"margin:0 0 14px;padding-left:22px;\"\u003e\n\u003cli\u003eConfirm the motor, battery, receiver and ESC connections are correct.\u003c\/li\u003e\n\u003cli\u003eInstall and secure the water-cooling tubing.\u003c\/li\u003e\n\u003cli\u003eSet up the transmitter and perform throttle-range calibration.\u003c\/li\u003e\n\u003cli\u003eVerify that the ESC detects the correct LiPo cell count.\u003c\/li\u003e\n\u003cli\u003eConfigure BEC voltage for the receiver and steering servo.\u003c\/li\u003e\n\u003cli\u003eSet the running mode and an appropriate low-voltage cutoff.\u003c\/li\u003e\n\u003cli\u003eCheck motor rotation and throttle response with the propeller safely clear.\u003c\/li\u003e\n\u003cli\u003eVerify water circulation before running the boat under significant load.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eAlways disconnect the LiPo battery after operation. The ESC can continue drawing a small amount of power when connected, potentially over-discharging the battery during storage.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eAdvanced Protection for Demanding RC Boat Use\u003c\/h2\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe SeaKing 90A V4 integrates multiple electronic protection functions designed to reduce the likelihood of ESC damage when operating conditions become abnormal.\u003c\/p\u003e\n\n\u003cul style=\"margin:0 0 14px;padding-left:22px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Voltage Protection:\u003c\/strong\u003e Helps prevent excessive LiPo battery discharge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eESC Over-Temperature Protection:\u003c\/strong\u003e Reduces output when the ESC temperature becomes excessive.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver-Current Protection:\u003c\/strong\u003e Responds to abnormal current conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThrottle Signal Loss Protection:\u003c\/strong\u003e Helps prevent uncontrolled motor operation when the receiver signal is lost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacitor Overheating Protection:\u003c\/strong\u003e Reduces output under excessive capacitor-temperature conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThese safeguards improve operating reliability but do not eliminate the need for correct component selection, secure electrical connections, adequate cooling and appropriate motor loading.\u003c\/p\u003e\n\n\n  \n  \n    \u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/002_86ec64d3-0867-48af-9b6a-b11c61a76ca7.png?v=1794385967\" alt=\"Hobbywing SeaKing 90A V4 marine ESC electronic protection against low voltage overheating overcurrent and signal loss\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eOfficial Hobbywing SEAKING 90A V4 Manual\u003c\/h2\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eFor wiring instructions, throttle calibration, programming connections, adjustable parameters, LED indicators, protection behavior and troubleshooting, refer to the official Hobbywing SEAKING V4 user manual.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/Hobbywing_SEAKING_120A-90A-60A-30A_V4__Manual.pdf?v=1794375916\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color:#E60073;text-decoration:underline;font-weight:bold;\"\u003eDownload Hobbywing SEAKING 90A V4 User Manual (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp style=\"font-size:13px;color:#666;margin:0 0 14px;\"\u003eThis manual also covers the SEAKING 30A, 60A and 120A V4 models. Always follow the 90A-specific electrical specifications and programming instructions.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eExplore More Hobbywing Marine ESCs \u0026amp; Accessories\u003c\/h2\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eLooking for another current rating or planning a different RC boat power system? Explore our \u003ca href=\"https:\/\/chinahobbyline.com\/collections\/hobbywing-seaking-escs\" style=\"color:#E60073;text-decoration:underline;\"\u003eHobbywing SeaKing ESC collection\u003c\/a\u003e to compare marine speed controllers across the SeaKing series, or browse our \u003ca href=\"https:\/\/chinahobbyline.com\/collections\/rc-boat-escs\" style=\"color:#E60073;text-decoration:underline;\"\u003eRC Boat ESC collection\u003c\/a\u003e for more electronic speed controllers designed for brushless marine applications.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eFor additional speed controllers and setup tools, visit our \u003ca href=\"https:\/\/chinahobbyline.com\/collections\/hobbywing-escs\" style=\"color:#E60073;text-decoration:underline;\"\u003eHobbywing ESC collection\u003c\/a\u003e and \u003ca href=\"https:\/\/chinahobbyline.com\/collections\/esc-programmers-accessories\" style=\"color:#E60073;text-decoration:underline;\"\u003eESC Programmers \u0026amp; Accessories\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eDoes the Hobbywing SEAKING 90A V4 support 4S LiPo batteries?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eYes. The SeaKing 90A V4 supports 2S, 3S and 4S LiPo batteries. Your brushless motor and complete propulsion system must also be rated for the selected voltage. 5S and 6S LiPo batteries are not supported by this model.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eIs the SeaKing 90A V4 waterproof?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eYes. It features IP67 waterproof and dustproof protection. The water-cooling system must still be connected correctly, and exposed plugs should be checked and dried after use to reduce corrosion risk.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eWhat size RC boat is the SEAKING 90A V4 suitable for?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eHobbywing recommends boats up to 80cm in length. Actual suitability depends on motor current draw, propeller load, cooling effectiveness and installation space.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eWhat is the difference between the SeaKing 60A V4 and 90A V4?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eThe 90A V4 increases continuous current capacity from 60A to 90A and supports up to 4S LiPo instead of 3S. It also features an 8A BEC with an additional 8.4V setting, larger power wiring and dedicated capacitor overheating protection.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eWhat is the difference between the SeaKing 90A V4 and 120A V4?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eThe 120A V4 supports 120A continuous current and up to 6S LiPo, compared with 90A and 4S for the 90A V4. Both models include an adjustable 6V\/7.4V\/8.4V 8A BEC and capacitor overheating protection.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eDoes the SEAKING 90A V4 have an 8.4V BEC option?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eYes. The integrated 8A switch-mode BEC supports selectable 6V, 7.4V and 8.4V output. The 8.4V setting should only be used with receiver and servo equipment specifically rated for that voltage.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eDoes the SeaKing 90A V4 have capacitor overheating protection?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eYes. Unlike the SeaKing 30A and 60A V4 models, the 90A V4 includes dedicated capacitor overheating protection. When triggered, the ESC reduces output until the capacitor temperature falls sufficiently.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eCan I adjust Freewheeling on the SEAKING 90A V4?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eYes. Freewheeling can be enabled or disabled using compatible Hobbywing programming equipment, allowing users to adjust motor-control behavior and deceleration characteristics.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eDoes the SEAKING 90A V4 have built-in Bluetooth?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eNo. Bluetooth connectivity requires a compatible external Hobbywing OTA module. The module enables supported HW LINK app functions, including programming and performance monitoring.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eCan the SeaKing 90A V4 record performance data?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eYes. The ESC supports peak-value recording and real-time data monitoring. Historical operating graphs require the appropriate external OTA connection; independent built-in historical graph recording is not supported.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eWhich programming devices work with the SeaKing 90A V4?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eThe ESC supports compatible Hobbywing LED Program Box, LCD G2, LCD Pro and OTA programming devices. Follow the official throttle-signal and yellow-signal cable connection instructions for this model.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eCan I update the SEAKING 90A V4 firmware?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eYes. Firmware upgrades are supported using compatible Hobbywing programming equipment and software. An appropriate LCD programming box or OTA module is required for the relevant update method.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eDoes the SeaKing 90A V4 come with a battery connector?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eNo. The 12AWG battery input leads are supplied without a preinstalled connector. Select and solder a connector suitable for the battery and current requirements. The motor outputs use 4.0mm gold female bullet connectors.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eCan I use the SeaKing 90A V4 with a brushed motor or two brushless motors?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eNo. It is designed to operate one compatible sensorless brushless motor. It is not a brushed motor controller, and a single ESC should not be used to drive two brushless motors.\u003c\/p\u003e\n\n\u003c\/div\u003e\n\n","brand":"ChinaHobbyLine","offers":[{"title":"Global","offer_id":67944393113814,"sku":"30302362 GL","price":57.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/001_a9e96aa3-2d3e-4574-a29b-0fd4116ecb1f.webp?v=1794386792","url":"https:\/\/chinahobbyline.com\/id\/products\/hobbywing-seaking-90a-v4-brushless-rc-boat-esc","provider":"ChinaHobbyLine","version":"1.0","type":"link"}