HOBBYWING EZRUN 3665SD 2400KV BLACK G3 SENSORED MOTOR HW30402604

Overview

The Hobbywing EZRUN 3665SD 2400KV Black G3 Sensored Motor represents the latest evolution in brushless motor technology for 1/10 scale RC vehicles. This third-generation sensored motor is purpose-built for short course trucks, truggies, and monster trucks, delivering the kind of reliable performance that serious RC enthusiasts demand. Whether you're exploring the world of brushless RC cars in the UK for the first time, or you're a seasoned competitor looking to upgrade your power system, this motor offers exceptional value and reliability. The 2400KV rating makes it an ideal choice for 2-4S LiPo batteries, giving you flexibility in your power configuration whilst maintaining smooth, controllable acceleration.

Hobbywing has engineered the EZRUN 3665SD G3 as a substantial performance upgrade over the previous G2 generation. The motor delivers 3% greater overall efficiency and a 5% increase in maximum output power compared to its predecessor, whilst generating significantly less heat under identical load conditions. This means longer run times, better throttle response, and cooler operating temperatures during extended driving sessions. The advanced sensored mode integration with the EZRUN MAX10 G2 ESC creates a perfectly matched power system that optimises motor performance and includes comprehensive motor temperature protection.

Built to handle all weather and track conditions, the EZRUN 3665SD features an IP-67 waterproof rating system that guarantees excellent protection against water and dust ingress. You can confidently drive through mud, sand, water, ice, and snow without risking damage to the motor. Combined with its modular detachable structure for easy maintenance, this motor is engineered to provide long-lasting performance whether you're weekend bashing or competing seriously in the UK RC scene.

Key Features

• High-Precision Hall Sensor Technology — The EZRUN 3665SD incorporates high-precision Hall sensor components that ensure the rotor position output is always accurate and consistent, which translates to excellent throttle linearity and precise control during demanding manoeuvres such as power wheelies, straight-line acceleration, and clearing jumps with confidence.
• Waterproof Front Bearing Design — The motor features a precision waterproof bearing at the front end, providing protection against dust and moisture ingress whilst maintaining smooth operation and supporting higher bearing speeds with minimal resistance.
• Precision Iron Rear Cover — The rear end incorporates a precision iron cover with a compact design that improves overall motor capacity whilst maintaining a lighter structure, supporting higher bearing speeds and keeping mechanical resistance low for optimal efficiency and reliability.
• IP-67 Waterproof System — The complete IP-67 waterproof protection system ensures your entire power unit can handle challenging terrain and weather conditions including mud, sand, ice, snow, and water without damage or performance degradation.
• Improved Sensored Cable Interface — The updated waterproof sensored cable interface provides enhanced durability and connectivity reliability, ensuring consistent sensor signal transmission for accurate motor operation in all conditions.
• Motor Temperature Protection — The upgraded sensored mode in the G3 generation includes automatic motor temperature monitoring and protection, safeguarding your motor from thermal damage during extended or high-intensity driving sessions.
• Premium Material Construction — Every component is carefully selected and approved by Hobbywing's in-house engineers, including high-tolerance alloy shafts, ultra-thin silicon steel sheets, high-temperature-resistance copper windings, and an explosion-proof rotor design for superior durability.
• Modular Detachable Structure — The motor's modular design allows straightforward disassembly and maintenance, helping you prolong the motor's lifespan and maintain peak efficiency with minimal effort during routine servicing.
• Perfect ESC Compatibility — The EZRUN 3665SD G3 is specifically optimised to work flawlessly with the Hobbywing EZRUN MAX10 G2 ESC, creating a matched power system that extracts maximum performance and reliability from both components.

Technical Performance

The EZRUN 3665SD 2400KV motor delivers outstanding performance characteristics across the board. Operating at 2400KV, this motor is compatible with 2-4S LiPo battery configurations, providing flexibility for different power requirements and driving styles. The no-load current is rated at less than 5.2A, indicating excellent efficiency and reduced strain on your battery and ESC during operation. With a 37mm outer diameter and 65.8mm length, the motor fits precisely into 1/10 scale short course truck, truggy, and monster truck chassis without requiring modifications. The 5mm shaft diameter accommodates standard 1/10 scale pinion gears, and the 4.0mm male bullet connectors ensure reliable power transmission. Weighing 304.5 grams, the motor maintains a reasonable mass that doesn't compromise vehicle balance or handling characteristics. The front bearing specification (D16×D5×T5) and rear bearing specification (D11×D5×T5) provide the high-speed support needed for consistent, reliable performance. With its 4-pole brushless design and sensored operation, this motor achieves superior throttle response and smooth power delivery compared to sensorless alternatives. The advanced Hall sensor system combined with high-precision bearings and precision engineering throughout ensures this motor will deliver dependable performance session after session, making it an excellent choice for anyone serious about brushless RC cars in the UK.

What's in the Box

• Hobbywing EZRUN 3665SD 2400KV Black G3 Sensored Motor
• Waterproof sensored cable with connector

What You Need to Complete

• 1/10 scale short course truck, truggy, or monster truck chassis compatible with 37mm diameter motors
• Brushless ESC compatible with sensored motors (Hobbywing EZRUN MAX10 G2 recommended)
• 2-4S LiPo battery pack
• LiPo battery charger
• Radio system with receiver
• Servo
• Suitable pinion gear (typically 13-16 tooth depending on desired gear ratio)

Frequently Asked Questions

• Is the Hobbywing EZRUN 3665SD 2400KV suitable for beginners to brushless RC cars UK? — Yes, absolutely. Whilst this is a high-quality motor from an established manufacturer, the 2400KV rating is considered moderate and forgiving. The sensored design provides smooth, predictable throttle response that beginners will find manageable, and the robust construction means it tolerates learning mistakes well. The motor's excellent efficiency also means less heat buildup, which reduces thermal stress during extended beginner practice sessions.
• What battery does this motor need and what runtime can I expect? — The EZRUN 3665SD 2400KV is compatible with 2S, 3S, and 4S LiPo batteries, offering flexibility based on your desired power and speed. A 2S battery provides manageable power suitable for learning, whilst 3S and 4S configurations deliver progressively more aggressive performance. Runtime depends on battery capacity, driving style, and terrain, but you can typically expect 15-25 minutes of active driving with a quality 3S or 4S LiPo pack of 5000-7000mAh capacity.
• How does the 3665SD G3 compare to other Hobbywing EZRUN motors for 1/10 scale? — The 3665SD represents the larger option in the EZRUN range compared to the 3652SD. The 3665 has a longer motor can (65.8mm versus 53mm), allowing it to handle higher cell count batteries (up to 4S) more effectively. The 2400KV variant of the 3665 is particularly well-suited to truck and truggy applications, whilst the 3652 series with its higher KV ratings (3300, 4100, 5400) suits lighter on-road and short course truck applications. The G3 generation across both models brings improved efficiency, increased power output, reduced heat generation, and enhanced waterproofing compared to the G2 versions.
• Is this motor waterproof and can I use it in wet conditions? — Yes, the EZRUN 3665SD features an IP-67 waterproof system that provides comprehensive protection against water and dust ingress. The waterproof front bearing and sealed sensored cable interface mean you can confidently drive through water, mud, sand, ice, and snow. The entire motor housing is engineered to shed moisture and prevent internal component damage, making this an excellent choice for British climate conditions and challenging terrain.
• Can I use this motor without an ESC and battery already? — No, this is a motor only and requires a separate brushless ESC, battery pack, charger, radio system, and receiver to complete a functioning RC vehicle. We recommend pairing this motor with the Hobbywing EZRUN MAX10 G2 ESC for optimal performance, as Hobbywing has specifically engineered these components to work seamlessly together.
• How easy is it to maintain and service this motor? — The EZRUN 3665SD's modular detachable structure design makes maintenance straightforward and accessible. The motor can be easily disassembled for cleaning, bearing replacement, or winding inspection. Hobbywing supplies detailed manuals covering basic maintenance procedures, and the precision engineering throughout means components don't require frequent replacement under normal driving conditions. Regular cleaning and occasional bearing service will keep this motor running smoothly for years.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the HOBBYWING EZRUN 3665SD 2400KV BLACK G3 SENSORED MOTOR HW30402604 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.