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OS MAX GT 33 with Silencer

When it comes to petrol engines, the GT33 stands out from the opposition. It has the muscle, runs more quietly than the competition while exceeding their output, and starts easily with electronic ignition that accepts many different battery types. O.S. have produced a petrol powerhouse for the serious pilot!

The rear mounted Walbro carburetor is designed for the GT22 with a choke rod guide integrated into the crankcase for easy setup.

Comes complete with IG-02 ignition system and Pitts Style Silencer, for super, quiet reliability.

Drops into the same bolt pattern as the 65AX glow so makes petrol conversions a breeze!


A superb engine that will give years of trouble free life. It is after all an O.S.!


Distance of screw hole / longitudinal [mm]: hoch 54
Distance of screw hole / crosswise [mm]: 70
Item Number Manufacturer: 38300
Diameter of fixing hole [mm]: 5,7
Bore [mm]: 36
Width [mm]: 80
rpm range, approx.: 1800-8000
Recommended propeller: 18x8-20x10"
Ratio oil/fuel: 1:30
All-up weight [g]: 980 + 140 silencer#CECECE
Height approx. [mm]: 161 with spark plug
Stroke [mm]: 32,4
Cylinder capacity [ccm]: 33
Cooling system: Air
Length to hub: 155
Output [kW / PS] at [rpm]: 2,9 (3,9) 9000
Carburetor : WT1024
Shaft thread: 5/16"-24 UNF-2A


pdf To download a PDF of the parts listing please click here

Spares and Accessories for your O.S. Engine
If you need any spares or accessories for your engine that are not listed on the site please contact us for a price and availability.

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