A spacer to suit the UMS 7-90cc — the seven-cylinder 90cc four-stroke radial from UMS.
On this engine the component is a spacer that sets the position or end-float of a rotating or bolted part.
Why this part matters: getting the stack height right matters, so a spacer is replaced when the original is crushed, worn or the wrong thickness is needed. Supplied as a pack of 4, which is how these small parts are normally bought — you rarely need just one.
Fitting note: Measure the assembled end-float rather than assuming the original spacer is correct.
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