Crank Case Cover Plate for O.S. Engine OS42507000  [OS42507000]

Cover Plate Details

This cover plate closes and secures the crank case section on compatible O.S. engines and serves as a spare or replacement to re-establish sealing and correct alignment after service or repair.

For installation, ensure mating surfaces are clean and free of burrs, position the plate over the case openings, and apply even torque to fasteners to avoid distortion. Check internal clearance to rotating parts before completing assembly.

In tuning and setup, a well-fitted cover plate contributes to crankcase rigidity and sealing integrity, which supports consistent idle and throttle response when combined with proper carburetor and exhaust tuning. Use it as part of routine engine maintenance.