55AX Crankcase Cover Plate OS25707000 by O.S. Engine  [OS25707000]

55AX Cover Plate: Product Summary

This O.S. Engine cover plate is an RC-scale crankcase component named in the product title for use with 55AX engine models. It reinstates the sealed enclosure that supports the crankshaft and related internal parts. Verify engine markings before assuming fitment with other engine codes.

When installing, make sure mating surfaces are clean and any old gasket material is removed or replaced. Tighten fasteners evenly, using a cross pattern to avoid distortion, and check for oil seepage after the initial run. This part restores case geometry and sealing but is not a tuning component.

Fit this cover plate during scheduled maintenance or repair when the original shows wear, hairline cracks, or persistent leaks. Keep removed fasteners and check hole alignment before final torqueing to confirm correct placement on the 55AX crankcase.