Product Description of Spektrum M-SPMX-1074 4685 950Kv sensorless brushless marine motor 

The Spektrum M-SPMX-1074 4685 950Kv sensorless brushless marine motor for 6S–8S boats is purpose-built for high-speed, torque-demanding RC marine platforms. Designed to deliver blistering acceleration and sustained top-end velocity, this motor features a 4-pole rotor and integrated water cooling jacket that actively manages heat during extended runs. Whether you're upgrading a deep-V hull or building a catamaran for aggressive driving, the Spektrum M-SPMX-1074 motor offers OEM fitment for the Pro Boat Super Sonicwake 48" 8S and supports high-current ESCs for reliable, high-performance propulsion.

Key features of the Spektrum M-SPMX-1074 motor

• 950Kv output – optimized for rapid acceleration and high-speed marine performance
• 4-pole rotor – delivers torque-rich propulsion and smooth throttle response
• Sensorless brushless design – reduces maintenance while maximizing efficiency
• Integrated water cooling jacket – maintains thermal stability during prolonged high-load operation
• 5mm hardened steel shaft – supports robust drivetrains and high-thrust propeller setups
• 6mm bullet connectors – ensure secure, high-current ESC integration with minimal resistance

Why is the 950Kv rating ideal for large-scale marine builds?

The Spektrum 950Kv motor for deep-V and catamaran hulls with high-current ESC support is tuned for high-RPM output on 6S–8S LiPo systems. Its Kv rating enables rapid acceleration and sustained top-end velocity, making it ideal for large hulls that demand both power and control. Whether you're racing across open water or executing tight maneuvers, the motor’s torque-rich delivery ensures consistent performance and responsive handling.

How does the water cooling jacket improve thermal stability?

The Spektrum M-SPMX-1074 with torque-rich rotor and high-efficiency cooling sleeve features an integrated water cooling jacket that actively dissipates heat during operation. This system prevents thermal buildup during extended throttle use, protecting internal components and maintaining consistent output. For RC boaters pushing their setups to the limit, the cooling sleeve ensures reliable performance and longer motor life—even in demanding conditions.

Is this motor compatible with the Pro Boat Super Sonicwake?

Yes. The Spektrum M-SPMX-1074 4-pole motor with water cooling jacket for Pro Boat Super Sonicwake is engineered for direct OEM fitment into the 48" 8S RTR platform. Its dimensions, shaft size, and connector type align perfectly with the factory setup, allowing for seamless installation and optimal performance. This compatibility makes it a strategic upgrade for users seeking enhanced speed, torque, and thermal resilience in their Super Sonicwake builds.

What makes this motor suitable for aggressive marine driving?

The Spektrum Firma motor for aggressive marine driving and sustained throttle loads is built with hardened materials and precision engineering to withstand vibration, water exposure, and high-load operation. Its sensorless brushless architecture reduces mechanical wear, while the 4-pole rotor ensures smooth and powerful propulsion. Whether you're bashing through chop or executing high-speed passes, this motor delivers the durability and control needed for confident marine performance.

For RC boaters seeking a high-performance upgrade, the affordable Spektrum 4685 950Kv motor with OEM fit for Super Sonicwake 8S platforms offers unmatched value, speed, and reliability. Buy Spektrum M-SPMX-1074 marine motor for high-speed 1/6–1/8 scale brushless boats.

Technical Specifications of Spektrum M-SPMX-1074 4685 950Kv sensorless brushless marine motor 

Brand, Model and Product Type

• Brand: Spektrum
• Model: M-SPMX-1074
• Product Type: Spektrum M-SPMX-1074 4685 950Kv sensorless brushless marine motor for 6S–8S boats, Spektrum M-SPMX-1074 4-pole motor with water cooling jacket for Pro Boat Super Sonicwake, Spektrum M-SPMX-1074 marine motor with 5mm shaft and 6mm bullet connectors, Spektrum M-SPMX-1074 with torque-rich rotor and high-efficiency cooling sleeve, Spektrum 950Kv motor for deep-V and catamaran hulls with high-current ESC support, Spektrum Firma motor for aggressive marine driving and sustained throttle loads

Dimensions

• Size Class: 4685 – measures 4.6 cm in diameter and 8.5 cm in length, ideal for large-scale marine hulls
• Shaft Diameter: 0.5 cm – hardened steel shaft supports high-load propeller systems

Performance and Power

• Kv Rating: 950Kv – optimized for high-speed acceleration and top-end velocity on 6S–8S LiPo setups
• Voltage Range: 25.2V to 29.6V – supports high-voltage marine power systems
• Motor Type: Sensorless brushless – delivers efficient torque with minimal maintenance
• Rotor Design: 4-pole – ensures smoother throttle response and torque-rich propulsion

Cooling and Efficiency

• Cooling System: Integrated water cooling jacket – actively dissipates heat during extended high-speed runs
• Thermal Stability: Engineered for sustained throttle loads in marine environments
• Efficiency: High-performance output with minimal thermal stress – ideal for aggressive driving

Connectivity and Integration

• Connector Type: 6mm bullet connectors – support high-current ESCs and reduce resistance
• ESC Compatibility: Compatible with high-output marine ESCs – designed for robust drivetrains
• OEM Fitment: Drop-in compatibility with Pro Boat Super Sonicwake 48" 8S – no modification required

Application and Use Case

• Designed For: 1/6–1/8 scale brushless RC boats – optimized for deep-V and catamaran hulls
• Driving Style: High-speed marine racing and aggressive throttle control
• Hull Compatibility: Engineered for large-scale platforms such as the Pro Boat Super Sonicwake

Construction and Durability

• Build Quality: Durable construction – withstands vibration, water exposure, and high-load marine use
• Cooling Sleeve: High-efficiency cooling sleeve – maintains performance during prolonged operation

What’s in the Box

• (1) Spektrum Sensorless 950Kv 4-Pole Marine Motor – model M-SPMX-1074
• (1) Integrated water cooling sleeve

What You Require

• (1) Compatible marine ESC rated for 6S–8S LiPo and 6mm bullet connectors

We want to make sure your delivery goes smoothly, so here are some important details about our service:

• For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
• Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
• Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
• If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
• We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
• As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
• If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
• For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.