O.S. Engine OS29067010 91SZ-H Crankcase Service Plate  [OS29067010]

Engine Crankcase Service Plate

A precision replacement, the O.S. Engine OS29067010 plate is made for crankcases specified with the 91SZ-H cover code. It returns proper enclosure fit where the factory plate has been removed for repairs or shows wear.

Fitment is simple for those familiar with nitro engine work: remove the old cover, ensure contact faces are debris free, align the replacement plate and tighten screws in a crisscross pattern to protect alignment. The plate is useful during seal checks and bearing or piston servicing.

Preserving correct crankcase geometry is important for compression consistency during bench tuning, and this plate helps retain those dimensions. Use it as a maintenance item rather than an aftermarket tuning part.