GT15HZ Cover Plate for RC Crankcase OS28157000 for O.S. Engine  [OS28157000]

Product summary for the GT15HZ crankcase cover

Designed to fit O.S. Engine GT15HZ models, this cover plate is a direct replacement for the crankcase closure and is intended for use in radio-controlled model engines. It reinstates the original mounting and sealing arrangement for the GT15HZ housing.

Functionally, the cover secures the crankcase, helps retain bearings and seals, and supports proper reassembly after maintenance. Prior to refitting, clean the mating surfaces thoroughly and make sure any gasket or sealing material is positioned to maintain chamber integrity.

Installation guidance: immobilise the engine in a bench mount or remove it from the model, choose the correct hex driver, and tighten fasteners in a star pattern to avoid distortion. Ensure dowel pins or locating features are engaged to allow correct alignment.

When to replace: this item is commonly replaced during routine teardown, bearing changes, or when inspecting the crankshaft assembly; swapping a damaged cover can stop minor leaks and help reestablish reliable compression that impacts idle and throttle response on glow engines.