F120 Rear Cover Fastening Screw YSF1231 compatible with YS Engine  [YSF1231]

F120 Rear Screw Details

This YS Engine back plate screw is a direct spare for the F120 back plate assembly used in scale RC glow engines, supplied under model YSF1231. It acts as the mounting fastener that holds the engine rear cover to the crankcase and is intended for replacement when the original screw is stripped, lost, or otherwise compromised.

Fitting advice: engage the screw squarely into the back plate boss and tighten with controlled torque to avoid thread damage; if it binds, stop and inspect the mating component. The part is designed to provide mechanical retention and should not be used as an adjustment for tuning.

Compatibility note: the product specifies fit for the F120 back plate; confirm that YSF1231 matches your engine's back plate configuration before ordering. This screw is suitable for routine overhaul work and rapid on-site replacement.