HYDRAULIC

H-4

H-4 Hydraulic Marine Gearbox

The most compact and lightest model in the range, the H-4 weighs just 40 kg and fits easily into tight engine rooms. Continuous operation up to 4,500 rpm makes it suitable for high-revving engines. It supports twin-engine installations and remote control.

⚓ APPLICATIONSSpeedboats · Light pleasure craft
Köysan® H-4

Specifications

Maximum Continuous Speed
4,500 rpm
Dry Weight
40 kg (88 lbs)
Oil Capacity & Type
1.5 L ATF
Reduction Ratios
1.0:1 · 1.5:1 · 2.0:1 · 2.5:1
SAE Bellhousing Options
SAE 2 · SAE 3 · SAE 4 · SAE 5
Engine Rotation
Clockwise and counter-clockwise
Twin-Engine Compatibility
Yes
Remote Control
Yes

Performance Data

RatioPleasureHeavy Duty
kWMaximum torque (Nm)kWMaximum torque (Nm)
1.5:11.881791.81172
2.0:11.721651.62155
2.5:11.561491.50143

The performance table shows only the reduction ratios for which data is available. Power ratings are stated in kW per 100 rpm. Specifications are subject to change without notice.

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