Replacement Crankcase Cover Plate for 91SZ-H - O.S. Engine OS29067010  [OS29067010]

O.S. ENGINES COVER PLATE 91SZ-H PS
Price:
CAD$18.95
Brand:
O.S. Engine
Model:
OS29067010
GTIN:
4531028139305
Condition:
Brand New
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Replacement Crankcase Cover

This machined cover plate is a direct replacement listed as O.S. Engine OS29067010, intended for crankcases that use the 91SZ-H cover designation. It serves to restore enclosure integrity and alignment when the original plate is worn or removed for service.

Installation is straightforward for experienced hobby technicians: remove the engine mounting screws securing the existing cover, clean the mating surfaces, position the new plate and tighten fasteners evenly to preserve crankcase alignment. The part supports routine maintenance such as seal inspection and reassembly after piston or bearing work.

During setup the cover helps maintain consistent crankcase geometry which contributes to reliable compression and predictable engine response during bench tuning. Treat this component as a service replacement in the RC engine toolkit rather than an upgrade that changes core engine specifications.

Can I fit this plate to engines other than the 91SZ-H?

The plate matches the 91SZ-H cover pattern; confirm your engine uses that specific designation before ordering to ensure correct fit.

What tools should I have on hand for the swap?

Basic tools include the correct hex drivers and a way to control fastener torque so the plate seals evenly without distorting the crankcase.

How do I check the installation is correct?

After fitting, rotate the crank by hand to confirm smooth movement, check compression feel and inspect the mating seam for gaps; re-torque fasteners if needed following your engine guidance.

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