OS GF-40 4-Stroke Gas engine (with electronic ignition)
Ideal for aerobatic or scale aircraft, the 4-stroke GF40 offers added torque and a more realistic sound, plus gas economy and the fit and finish O.S. is famous for. It also includes an ignition module that eases starting and automatically adjusts timing to throttle settings. Other features include a Walbro® carburetor and an integrated choke rod guide that simplifies installation. The GF40 includes a muffler, spark plug and a 2-year limited warranty.
O.S. Two Year Limited Warranty
Easily installs in the same mounting pattern as the GT33
Positive Crankcase Ventilation (PCV) system helps keep your model and the environment cleaner without blow-by gas and oil waste
Choke rod guide is integrated with the backplate for convenience
Includes a special Walbro carb and a compact, lightweight ignition module

FEATURES
OSMG0800
Displacement: 2.438 cu in (39.96 cc)
Bore: 1.574 in (40 mm)
Stroke: 1.251 in (31.8 mm)
RPM Range: 1800-9000
Output: 3.75 hp @ 8600 rpm
Weight:
Engine: 41.3 oz (1170 g)
Muffler: 4.0 oz (113 g)
Ignition Module: 3.4 oz (95 g)
Includes: F-6040 muffler assembly, ignition module & CM-6 spark plug
Requires: 2-cycle oil, unleaded gasoline, ignition battery & standoffs
Suggested Props: 18x8-12, 19x8-10 & 20x8-10
Suggested Break-In Prop: 18x8
Ignition Battery: 4-7 NiCd or NiMH; 2S LiPo or LiFe. Min. capacity: 1000mAh