O.S. Engine 91HZ-PS 3D Ring  [OSMG1977]

The 91HZ Ringed Heli Engine is a significant player at heli competitions worldwide, and this newest version takes 3D performance to a different level!

The redesigned regulator is put horizontally, working with the PD-08 fuel pump it provides a stable method of getting fuel regardless of the helicopters attitude or need on engine.
The piston and crankshaft are designed to reduce vibration and enhance torque throughout the whole rpm range.
The narrow profile regarding the heat sink mind assists the 91HZ fit totally inside air conditioning shrouds without cutting or losing air conditioning power,and a thermo insulator regarding the 61B-PII carburetor obstructs engine temperature to make sure a stable fuel/air mix.
Includes in-flight needle value adjustment arm.

SPECS

• Inventory Number: OSMG1977
• Displacement: 0.91 cu in (14.95 cc)
• Bore: 1.09 in (27.7 mm)
• Stroke: 0.98 in (24.8 mm)
• Practical rpm: 2,000-16,000
• Energy Output: 3.4 hp @ 15,000 rpm
• Weight: 1.4 lb (635 g)
• Includes: 61B-PII carburetor, #8 radiance plug