Engine type 4-stroke 2-cylinder
OHV petrol engine
90° V-twin design
horizontal shaft
Cylinder sleeve type Cast iron sleeve
Bore x Stroke 2 / 78 x 72 mm
Displacement 688 cm³
Compression ratio 9.3 : 1
Net power 16.0 kW ( 21.5 HP ) / 3600 rpm
Cont. rated power 11.0 kW ( 14.8 HP ) / 3000 rpm
12.5 kW ( 16.8 HP ) / 3600 rpm
Max. net torque 48.3 Nm ( 4.93 kgfm ) / 2500 rpm
Ignition system Digital CDI with variable ignition timing
Carburator 2-barrel, fuel cut solenoid
Lubrication Full-pressure
Starter Electric
Fuel cons. at cont. rated power 6.3 L/h - 3600 rpm
Engine oil capacity 1.9 Liter
Dimensions (L x W x H) 429 x 410 x 438 mm
Dry weight 44.6 kg
Power curve GX660

The power rating of this engine is the net power tested on a production engine for this engine model and measured in accordance with SAE J1349 at a specified rpm. Mass production engines may vary from this value. Actual power output for the engine installed in the final machine will vary depending on numerous factors, including the operating speed of the engine in application, environmental conditions, maintenance, and other variables.

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Dimensions GX660
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