Crankcase Gasket for Zenoah G450PU - K281721311 Replacement  [K281721311]

Replacement gasket for Zenoah G450PU crankcase

The Zenoah K281721311 crankcase gasket is supplied as a service spare for the Zenoah G450PU RC engine. It provides the required sealing face between the crankcase halves to help preserve internal pressure and control oil retention in nitro engines.

Fit this gasket when overhauling the engine, if oil is escaping from the crankcase joint, or after repeated dismantling. Clean mating surfaces thoroughly before fitting, remove all residues of the previous gasket, and examine the crankcase for any distortion or damage. Ensure the gasket is aligned accurately with bolt holes and locating features to prevent pinching or misalignment that could cause leaks.

Do not assume extra parts are necessary; follow the engine manufacturer's specified bolt pattern and torque settings during assembly, and perform a low-throttle run to confirm a good seal before full operation. Proper sealing supports stable idle and predictable carburetor behavior, so include gasket checks when diagnosing running issues.