O.S. Engines GF40 Airplane Engine 4-Stroke Gas F-6040 Muffler OSM39400

This is the O.S. Engines GF40 4-Stroke Gasoline Airplane Engine with a F-6040 Muffler included.
Features:

• Ideal for aerobatic or scale aircraft
• Walbro carburetor witn integrated choke rod guide that simplifies installation, choke rod guide is integrated with backplate
• Same firewall mounting system as the O.S. GT33
• Positive Crankcase Ventilation (PCV) helps keep model and environment cleaner without blow-by gas and oil waste
• Two year limited warranty through Hobby Services beginning at date of purchase

Includes:
One O.S. Engines GF40 4-Stroke Gasoline Airplane Engine, CM6 Spark Plug, F-6040 Muffler, Ignition Module and Instructions
Requires:
2-cycle oil, see SPECS
Ignition Battery: 4.8-6.0V NiCd or NiMH, 6.6V LiFe or 7.4V LiPo pack
LiPo battery requires voltage regulator
Propeller: 18x8 for break-in, 18x8-12, 19x8-10 20x8-10
Mounting standoffs, length depends on aircraft
Gasoline safe fuel tubing and fuel filter

Specs:

Displacement: 2.438 cu in (39.96 cc)
Bore: 1.57" (40mm)
Stroke: 1.251" (31.8mm)
Practical RPM Range: 1,800-9,000
Engine Weight: 42.3oz (1200g)
Muffler Weight: 4.0oz (113g)
Ignition Module Weight: .4oz (95g)
Gasoline/Oil Mixture: 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 Hub: 4.7" (118.5mm)
Length from Center of Crankcase to Drive Hub: 3.1" (78.6mm)
Length from drive hub 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)
Distance between Vertical Mounting Hole Centers: 2.1" (54mm)
Distance between Horizontal Mounting Hole Centers: 2.7" (70mm)
Width of Cover Plate: 3.3" (83.7mm)