Parts/Engines & fuel/Engine parts/O.S. Engines Piston Ring
O.S. Engines Piston Ring
O.S.

O.S. Engines Piston Ring

Part # OSM29503400
Where to buy
$19.99
AMain Hobbies
Seen Oct 12, 2026
$19.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

This a replacement O.S. Engines Piston Ring, and is intended for use with the O.S. 91HZ F3C, and 91HZ-PS Helicopter Engines.


This Part Is Used In The Following O.S. Engines
 91FX  91RZ-H  91RZ-H DH
 91SZ-H
 91SZ-H PH

NOTE: This part may be compatible with other O.S. engines. Please check your owner's manual and cross reference the part number to verify that this is the correct part for your engine.

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