Displacement: 170 cc (10.37 cu in)
Bore: 2.05" (52mm)
Stroke: 1.57" (40mm)
Weight: 9.06lbs (4110g)
RPM Range: 1,100-9,000
Output: 17.5 hp @ 9,000 rpm
Compression Ratio: 9.5:1
Gasoline/Oil Mixture: 30:1
Weight: Engine 7.83lbs (3,550g)
Two Mufflers: 7.05 oz (200g) combined weight
Ignition: 5.64oz (160g)
Replacement Spark Plug: NGK CM6 (DLEG5626) or equivalent
Carburetor Settings: Carburetor was preset from the factory and only
requires small incremental adjustments.
Low Speed Needle: 1 turn open
High Speed Needle: 1 turn open
Adjust high speed needle to peak RPM. If the engine slows or dies,
the high speed mixture is too lean.
Adjust low speed needle for a smooth idle and reliable transition to
high throttle. If engine dies when throttle is advanced, the
mixture is too lean. If engine stumbles when throttle is advanced,
the mixture is too rich.