GGT10 Replacement Crankcase for RC Glow Engines OS4A401000 by O.S. Engine  [OS4A401000]

Replacement Crankcase for GGT10 Series

This O.S. Engine crankcase is supplied as a direct replacement identified by model number OS4A401000 and designed for RC-scale GGT10-series engines. The description concentrates on fitment, the crankcase role in assembly, and its relevance for routine engine servicing and bench tuning without adding claims beyond the part designation.

The crankcase houses internal components and provides the mounting faces required during assembly and inspection. Model OS4A401000 is used by hobbyists and technicians when rebuilding an engine after wear or when performing bench-level clearance checks during setup.

Installation guidance here is intentionally high-level and follows common RC practices: confirm the OS4A401000 part number against your engine parts list, inspect mating faces and bearing fits before assembly, renew gaskets and seals where needed, and use proper torque patterns for mounting hardware. For exact torque values and bearing specifications consult the engine's official service literature.

Choose this crankcase when you need an OEM-design replacement for GGT10-style RC glow engines, and fit appropriate bearings and seals during reassembly to restore alignment and serviceability.