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OS Max 91 3D Speed Engine
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Meet the OS Max GT15HZII!
This is the latest version of the proven OS Max GT15HZII gasoline engine. Out of the box this assembled engine includes
- The lasted design piston/Ring
- Machined back plate for maximum piston clearance
- .90 size 8mm crankshaft - fits most 700 class fan/clutch/hubs
- Latest design wire piston pin clips
- OS Max HD cooling head- significant cooling improvement
- OS EI system, spark plug, fuel pump, throttle arm and instructions
- Does NOT include muffler
Perfect fit for the JCD 5xx gas conversions
Fits most 700 class helicopters including the Goblin Nitro (with fan shroud modifications
NOTE: See additional running requirements under Technical Specs
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OS91 3D Speed + PowerTune .91 Muffler
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