A o-ring bottom cover to suit the UMS 7-160cc — the seven-cylinder 160cc four-stroke radial from UMS.
On this engine the component is the O-ring sealing the bottom cover.
Why this part matters: the bottom cover seal is where oil leaks are most visible and most likely, so it is renewed at every service. Supplied as a pack of 10, which is how these small parts are normally bought — you rarely need just one.
Fitting note: Check the cover face for nicks before fitting the new ring.
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