O.S. Engine 91HZ  [OSMG1975]

With back-to-back FAI world championships in 2005 and 2007, the 91SZ-H was effective by anyone's criteria. Now there's the 91HZ ?V a 91SZ-H redesigned along with the information worldwide's top pilots. It provides the tuning simplicity and satisfaction perseverance the multi-time world champ and design innovations that promote improved cooling, a tighter compression seal ?V and tuning convenience!

The slim profile of the heat sink mind assists the 91HZ fit totally inside cooling shrouds without cutting or losing cooling power!
Two temperature sinks ?V one on head, another in regards to the crankcase ?V enable airflow to keep away heat and keep maintaining performance.
Better basic protection decreases motor noise and promotes smoother, stronger performance.
The most up-to-date 61B carbohydrate takes persistence to another degree. Dependability features focus on an insulating band which prevents crankcase temperature from impacting carbohydrate settings. a generous usage of O-ring seals ?V two about the primary needle, one to the rotor ?V prevents environment leakages and power modifications.
In-flight control for the needle valve guarantees smooth, constant runs.

Specs:

• Stock volume: OSMG1975
• Displacement: 0.912 cu in (14.95 cc)
• Bore: 1.091 in (27.7 mm)
• Stroke: 0.976 in (24.8 mm)
• bodyweight: 21.8 oz (618 g)
• Practical RPM quantity: 2,000-16,000
• production: 3.4 hp @ 15,000 rpm
• Includes: 61B carburetor, muffler, in-flight needle valve modification supply & #8 radiance plug