A o-ring(sealing ring) to suit the UMS 5-180cc — the five-cylinder 180cc four-stroke radial from UMS.
On this engine the component is a sealing ring for engine joints and covers.
Why this part matters: a single-use item replaced at each disassembly. Supplied as a pack of 10, which is how these small parts are normally bought — you rarely need just one.
Fitting note: Check the mating groove for corrosion before fitting.
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