This Zenoah K216921210 oil seal is made as a replacement sealing part for G240RC and G270RC two-stroke RC engines. It is supplied without packing and is intended to restore proper sealing in crankcase and gearbox areas.
Replace the seal if you notice oil tracking or as part of a rebuild; the K216921210 is used as a direct replacement where the original part number 516653701 is being superseded. Confirm shaft and bore condition before installing.
Practical advice: use an even pressing motion and the correct diameter tool to seat the seal without bending the lip. Remove any contamination from mating surfaces and check for runout to ensure a long service life.
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