Thermal Spacer for 10J 10M 10D Engines - O.S. Engine OS21165010  [OS21165010]

Heat isolation accessory for model engines

This thermo insulator is intended for models fitted with 10J, 10M, and 10D engine variants to reduce unwanted heat transfer at mounting and contact points. As a non-invasive accessory, it promotes steadier thermal behavior that can influence fuel mixture response and tuning repeatability.

Use it to buffer the chassis or neighbouring fittings from engine heat; typical roles are to minimise heat soak into structural parts and help keep running conditions consistent during development and testing. It is not a substitute for dedicated cooling hardware.

Fitment advice: verify the component against your engine layout before tightening, keep all moving parts clear, and ensure exhaust and airflow remain unobstructed. After fitting, small tuning tweaks may be necessary to re-establish optimum settings.