Displacement: 2.45 cu in (40.0 cc) Bore (x2): 1.26 (32mm) Stroke (x2): 0.98 (25mm)
RPM Range: 1 500-8 500
Performance: 4.8 HP @ 8 500RPM
Idle Speed: 1500RPM
Compression Ratio: 10.5:1 Overall
Weight: 3.3lbs (1.5kg)
Engine Weight: 2.58lbs (1170g)
Muffler Weight (x2): 3.6oz (102g)
Ignition Module Weight: 5.3oz (149g)
Engine Mount Standoff Weight: 0.7oz (19g)
Miscellaneous Item Weight: 2oz (56g)
Width between Cylinder Heads: 7.1 (180mm)
Distance between Mounting Hole Centers/Narrow Side: 2.1 (54mm)
Distance between Mounting Hole Centers/Wide Side: 2.7 (70mm)
Length/Backplate to Outer Edge of Prop Drive Hub: 6.3 (161mm)
Distance from Crankshaft Center/Outer edge of Carb: 3.5 (90mm)
Standoff Length: 0.98 (25mm)
Spark Plug Gap: 0.018 - 0.020 (0.45mm - 0.51mm)
Carburetor Settings; (carb is preset at factory and should require only small adjustments)
Idle Adjustment Screw: Turn clockwise to increase idle speed conterclockwise to decrease idle speed Low
Speed Needle: Turn needle to fully closed position then open 1.25 turns High
Speed Needle: Turn needle to fully closed position then open 1.5 turns-tachometer is recommended when setting high speed needle to obtain maximum speed1