O.S. Engine OS22884250 dust cap set for 21RG,21RZ-V99,21VZB precision dust caps for RC glow engines  [OS22884250]

Dust cap set for 21-series engines

This dust cap set is an RC-scale engine accessory designed to protect the intake area of compatible O.S. glow engines. It serves as a simple barrier against dust and debris when the model is stored, transported, or awaiting maintenance. The design focuses on fit and durability rather than performance modification.

Compatibility is limited to the models listed in the product name, so confirm your engine code before fitting. Installation is straightforward: place the cap over the carburetor intake or specified opening, ensure a secure seating to limit dust ingress, and avoid forcing the part onto mismatched fittings to prevent damage to the carburetor body or the cap.

The caps are intended as a maintenance and storage aid for hobby use and do not alter engine tuning or internal settings. Keep them clean and inspect for wear before reuse to maintain a reliable seal.