Zenoah G23

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A fellow RC pilot and kind soul gave this to me in 2016. It has been converted from its original magneto ignition to a CH electronic ignition by Ralph Cunningham, which is a mark of distinction. I have been in touch with Ralph and he let me know that he started this type of conversion around 1989. He provides a lifetime guarantee, and it's still valid on this engine.

Muffler in position (bolts missing)

This engine is different from my other gassers in several respects.

Mounting - There are three mounting holes and they have 10-32 threads.

Mounting holes - 10-32

Carb - It's a Walbro WA197A with no choke.


The carb is also reedless.

Reedless carburetor

Ignition connection - RCA jack vs JR/Futaba connector.

Ignition jack

Muffler - points in an interesting direction.

Muffler in position (bolts missing)

Because so much about this engine is new to me, I built an engine test stand to try it out before I put it on a plane. As yet I have not been able to get it running.

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Type: Single cylinder 2-stroke gas
Fuel: Shell 91 octane
Oil: Redline synthetic
Ratio: 32:1
Power: 1.9 hp
Displacement: 22.5cc (1.37 cu in)
Weight: 1.3 kg (2.8 lbs)
In service since owned: 0h 00m
Propeller(s): 16x8

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All photos

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