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Model: OS Motors OSMG0800
Dist. #: OSMG0800   SKU: OSMG0800

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Updated on Sep 24, 2018 10:04:48 AM

GF40 4-Stroke Gas Engine w/F-6040 Muffler...
This is the O.S. Engines GF40 4-Stroke Fuel Engine.

Suitable for aerobatic or scale aircraft
Exact same firewall software installing system as the O.S. GT33
Walbro carburetor witn integrated choke rod guide that streamlines
    installation, choke rod guide is integrated with backplate
Favorable Crankcase Ventilation (PCV) helps keep model and environment
    cleaner without blow-by gas and oil waste
2 year minimal warranty through Hobby Services starting at date of

GF40 4-Stroke Fuel Engine, CM6 Glow Plug, Muffler, Ignition
    Module and Instructions

2-cycle oil, see SPECS
Ignition Battery: 4.8-6.0V NiCd or NiMH, 6.6V LiFe or 7.4V LiPo pack
    LiPo battery needs voltage regulator
Propeller: 18x8 for break-in, 18x8-12, 19x8-10 20x8-10
Installing standoffs, length depends on aircraft
Fuel safe fuel tubing and fuel filter

Displacement: 2.438 cu in (39.96 cc)
Bore: 1.57" (40mm)
Stroke: 1.251" (31.8mm)
Practical RPM Range: 1,800-9,000
Weight: Engine, 42.3oz (1200g)
Muffler, 4.0oz (113g)
Ignition Module, 3.4oz (95g)
Gasoline/Oil Mix: 30:1 - 50:1
    25:1 fuel/oil mixture if brand of oil states 50:1 mix
Crankshaft Size: UNF5/16-24
Length from Backplate to Drive Center: 4.7" (118.5mm)
Length from Center of Crankcase to Drive Center: 3.1" (78.6mm)
Length from drive center to end of Crankshaft: 1.6" (41mm)
Length from Carburetor to end of Crankshaft: 7.8" (197.6mm)
Height from Center of Crankshaft to Rocker Cover: 4.9" (126.7mm)
Height bottom of Crankcase/top of Rocker Cover: 6.2" (157.2mm)
Range between Vertical Mounting Hole Centers: 2.1" (54mm)
Range between Horizontal Mounting Hole Centers: 2.7" (70mm)
Width of Cover Plate: 3.3" (83.7mm)
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