MOTOR OS GF40 GASOLINE 4T W/MUFFLER F-6040 39400

A compact, 4-stroke gasoline powerhouse.

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.

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

Notes from our tech department:

This is the O.S. Engines GF40 4-Stroke Gasoline Engine.

FEATURES

Ideal for aerobatic or scale aircraft

Same firewall mounting system as the O.S. GT33

Walbro carburetor witn integrated choke rod guide that simplifies installation, choke rod guide is integrated with backplate

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

GF40 4-Stroke Gasoline Engine, CM6 Spark Plug, Muffler, Ignition Module and Instructions

REQUIREMENTS

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

SPECIFICATIONS

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 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)