91HZ O.S. Engine  [OSMG1975]

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

The slim profile of this heat sink mind assists the 91HZ fit completely inside cooling shrouds without cutting or losing cooling power!
Two temperature sinks ?V one on mind, another concerning the crankcase ?V enable airflow to hold away heat and keep maintaining performance.
Better general security reduces engine sound and promotes smoother, more powerful performance.
The most recent 61B carbohydrate takes consistency to the next degree. Dependability features concentrate on an insulating ring which prevents crankcase temperature from impacting carbohydrate settings. a generous usage of O-ring seals ?V two about the primary needle, one into the rotor ?V prevents environment leakages and power changes.
In-flight control of the needle valve guarantees smooth, constant runs.

Specs:

• Stock quantity: 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 number: 2,000-16,000
• manufacturing: 3.4 hp @ 15,000 rpm
• Includes: 61B carburetor, muffler, in-flight needle valve modification supply & #8 radiance plug