Seaking 4685SL 900kV Black V2 Brushless Motor

900kV Brushless Motor for RC Boats

Efficient Heat Dissipation, Lower Operational Temperatures
The motor’s water-cooling jacket features a high-efficiency internal circulation design, with external cooling fins and fan
blade-shaped ventilation holes on the front and rear end caps. This design not only enables rapid motor cooling but also
ensures stable performance and consistent power output during prolonged high-power and high-torque operation.

Perfectly Compatible with
SeaKing 200A/300A HV V4 ESC
When paired with the SeaKing 200A/300A HV V4 ESC, the motor delivers smoother control, faster response,
and a more exhilarating experience!

Combining Style and Performance
The motor end caps feature fan blade-shaped cooling holes inspired by propeller designs. The water-cooling jacket is
equipped with CNC-machined polished cooling fins, combined with a golden-ratio design. This not only delivers exceptional
performance but also offers a visually striking appearance.

fan blade-shaped cooling holes

Two KV Options for
Enhanced Compatibility
The 4685 motor is available in two versions: 900KV (6-14S) and 1500KV (6-8S), meeting configuration
requirements for different voltage ranges and propeller setups.

6-14S LiPo

6-8S LiPo
Reliable Materials and
Durable Construction
Constructed with a high-hardness CNC aluminum housing, premium brand high-quality bearings, ultra-thin silicon steel
laminations, high-temperature oxygen-free copper wire, high-temperature explosion-proof rotor, and high-toughness alloy
output shaft. Every material is carefully selected to ensure the motor delivers long-lasting and stable performance.
High-hardness CNC
Aluminum Housing

Ultra-thin Silicon
Steel Laminations

High-temperature
Explosion-proof Rotor

High-toughness
Alloy Output
Shaft
Premium Brand
High-quality Bearings

High-temperature
Oxygen-free Copper Wire 

Specifications

Type

• Brushless
• Sensorless
• 4 Pole

Relevant Parameters

• 900KV Rating
• 6-14S LiPo Cells
• 2.7A No-load Current(A)

Size & Weight

• 46 O.D.(mm)
• 85 Length (mm)
• 5 Shaft Diameter (mm)
• 610 Weight (g)
• D19*D6*T6 Front Bearing
• D19*D6*T6 Rear Bearing

Other Parameters

• ESC
• Boat Applicable

• Seaking 200A HV V4
• Boat Length ≤140cm

Hobbywing Part # 30419000