SKU: 31939509116

Hobbywing SeaKing 90A V4 Brushless Marine ESC

Sale price$48.56 Regular price$53.95
Save 10%

Pay in installments of $13.49 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 10 - Aug 15

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Hobbywing SeaKing 90A V4 Brushless Marine ESCHigh Performance 4S Capable Electronic Speed Controller The Hobbywing SeaKing 90A V4 Brushless Marine Electronic Speed Controller (ESC) is designed to deliver exceptional performance for marine applications. With advanced waterproofing, built in Bluetooth functionality, and a robust power management system, this ESC is ideal for competitive racers and RC boat enthusiasts. Engineered for reliability and convenience, it offers seamless integration with

High-Performance 4S Capable Electronic Speed Controller

The Hobbywing SeaKing 90A V4 Brushless Marine Electronic Speed Controller (ESC) is designed to deliver exceptional performance for marine applications. With advanced waterproofing, built-in Bluetooth functionality, and a robust power management system, this ESC is ideal for competitive racers and RC boat enthusiasts. Engineered for reliability and convenience, it offers seamless integration with modern technology to provide a superior racing experience.

About the SeaKing 90A V4 ESC


Unmatched Waterproofing & Cooling

Featuring an IP67 protection rating, the SeaKing 90A V4 is designed to withstand water, dust, and splashes under normal usage conditions without requiring additional waterproofing treatments. Its dual-channel water cooling system enhances heat dissipation, ensuring the ESC maintains safe operating temperatures during intense use. For added protection, the ESC includes a spark-proof circuit and capacitor overheating safeguards, extending its durability in demanding environments.

Integrated Bluetooth & Data Logging

The built-in Bluetooth functionality simplifies ESC programming and firmware updates. Users can connect directly to the "HW LINK V2" app on their mobile devices to adjust settings, view historical data, and monitor performance in real-time without additional hardware. The ESC's internal logging module captures up to ten minutes of operational data, enabling post-run analysis through the app for optimal tuning and maintenance.

Advanced Power Management

The SeaKing 90A V4 is equipped with a powerful switch-mode BEC with selectable output voltages of 6V, 7.4V, and 8.4V. This ensures compatibility with high-torque and high-voltage servos for precise and responsive control. Additionally, the Freewheeling function enhances deceleration and steering control, while the AUX external control channel allows for real-time parameter adjustments using the remote, ensuring unparalleled control during competitive races.

Features:

  • IP67 waterproof and dustproof rating
  • Dual-channel water cooling system
  • Built-in Bluetooth for app connectivity
  • Internal data logging for performance tracking
  • Spark-proof circuit for high-voltage protection
  • Switch-mode BEC with 6V, 7.4V, and 8.4V output options
  • Freewheeling function for enhanced deceleration and control
  • AUX external control for real-time parameter adjustments
  • Eleven programmable parameters for racing customization
  • Capacitor overheating protection

Includes:

  • (1) SeaKing 90A V4 Brushless Marine ESC
  • Product Manual

Specifications:

Suggested Application RC Boats (Max. Length 31.5in)
Motor Type Brushless
Input Voltage 2-4S LiPo (7.4-14.8V)
Continuous Current 90A
Peak Current 360A
Dimensions (LxWxH) 2.36x1.43x0.89in (60x36.3x22.5mm)
Weight 4.08oz (115.6g)
Motor Limits -
BEC Voltage 6V/7.4V/8.4V (Switch-Mode)
BEC Continuous Current 8A
BEC Peak Current -
Motor Connector Solder
Battery Connector Solder
Motor Wire 12AWG
Battery Wire 12AWG
Programmable Yes, through "HW Link V2" App (iOS & Android)

*Tech Note: This ESC does not have reverse polarity protection. Ensure proper connections are made as outlined under step 5 per the owner's manual. Reversing polarity will damage the ESC.

**Tech Note: Always disconnect the battery after use. The ESC draws a small current when connected even if the system is powered off, which can fully drain the battery and cause damage.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 31939509116

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.4 ★★★★★
Based on 13 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
R
Verified Purchase
Robert Heath
Fort Morgan, US
★★★★★ 5
The color and how well it looks
Color: GZ3255Z:Silver band&Blue dial
I have a lot of comments everywhere I go about the color, how smart the watch looks and I just love it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 25, 2025
T
Verified Purchase
The best watch OUPINKE
Chelsea, US
★★★★★ 5
Sayed Sahil
Color: GZ3255Z:Two tone band&Blue dial, Color: GZ3255Z:Two tone band&Blue dial
OUPINKE watch is Comfortable and best quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 2, 2024
D
Dom Miliano
Massapequa, US
★★★★★ 5
Classy fully automatic watch - lots of bling too
Watches with a mechanical movement are becoming more mainstream despite the impact of smart watches and quartz movement timepieces. With a pure mechanical watch, there are no concerns about battery charge so when you pick it up from the nightstand, all you would have to do is give the stem a twist to wind the main spring, reset the time and off you go - and that's only if it has stopped. If it hasn't stopped (it won't if you wear it every day or have a watch winder) you strap it on and you are all set. I gave this watch my regular accuracy test set against a clock linked to the atomic time source. To my great surprise, it was as accurate as one of my much more expensive mechanical watches (how much more expensive? This watch costs about the same as the sales tax on the most pricy watch in the closet !!) I use the included watch bracelet tool to remove a link from the watch to get a proper fit. Including the tool in the box saves you the $10 plus fee a jeweler might charge you to make the adjustment - very cool. And you probably will need to remove at least one link - some may need to remove two - since the bracelet has a generous size. Speaking of the bracelet, it's beautiful. I wore the watch today to church and a friend said it had "heavy duty bling" ... But she did say she thought it was beautiful and I concur. Finally, The way the bracelet clasp works is reminiscent of a Longines bracelet i have and that spells quality to me. The dial is black with chrome shiny minute markers so visibility in good light is excellent. I do not detect any glow in the dark markings on the hands or the minute markers - factor that in for your purchase decision. I see this watch as serving as your "good" watch for business wear, to don for a meal at a fancy restaurant or for that big date night. I think it has a classic look that (despite the bling of the bracelet) is conservative enough for anyone and any business situation.The only place I wouldn't wear it is to the beach or the gym despite the fact that it has claimed that it is waterproof to depths you probably will never experience. Accurate, beautiful, real quality that translates to good value and capable of being almost anyone's "good" watch. Recommended
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 1, 2021
M
Verified Purchase
Maidelyn Diaz
Houston, US
★★★★★ 5
Es muy elegante
Color: 3316:white band white dial
The OUPINKE Automatic Two-Tone Skeleton Watch is a stylish timepiece that blends luxury design with mechanical craftsmanship. Its gold and silver stainless steel construction gives it an elegant, premium look suitable for both formal and casual occasions. Design & Appearance: This watch stands out with its two-tone bracelet and gold-accented bezel, creating a bold and sophisticated aesthetic. The dial features crystal-style hour markers, multiple subdials, and a visible skeleton window at the bottom that showcases the internal movement. These details add a high-end feel often associated with more expensive watches. Movement & Performance: It uses an automatic mechanical movement, which means it winds itself through the motion of your wrist—no battery required. This is a major advantage for watch enthusiasts who appreciate traditional watchmaking. The watch also includes useful calendar features such as day, date, and month indicators. Build Quality: The stainless steel case and bracelet feel solid and durable. The polished finish enhances its luxury appeal, although like most polished watches, it may show fingerprints or small scratches over time. Comfort: Despite its robust design, the watch is comfortable to wear. The bracelet is well-balanced, and the clasp keeps it secure on the wrist.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 18, 2026
G
Verified Purchase
GJK
Birmingham, US
★★★★★ 5
Exceptional quality
I have only had the watch for a few days, but Oupinke watches are very high quality. It keeps time very well and serves as an attention grabber. Great value for the money. It isn't easy to determine where it was made, but it is a Chinese company. Don't stop there with preconceived ideas about cheap products and low quality from China. These watches are exceptional, high-end, and dedicated to creating a brand that endures and stands for quality, rather than simply turning a profit. I would put this watch against those that cost 3-4 times as much. If you are a watch enthusiast, they are worth adding to your collection.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 17, 2025

recommand products