A base plate lock screw to suit the UMS 5-150cc — the five-cylinder 150cc four-stroke radial from UMS.
On this engine the component is the locking screws securing the base plate to the crankcase.
Why this part matters: these fasteners hold the whole engine to the mount, so they are renewed on overhaul and checked for stretch. Supplied as a pack of 10, which is how these small parts are normally bought — you rarely need just one.
Fitting note: Torque to the factory figure and check again after the first run.
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