F120 Cylinder Head Screws YSF1218 by YS Engine  [YSF1218]

Replacement screw kit for F120 cylinder heads

This spare part supplies the mounting screws designated for the F120 cylinder head, sold under the YS Engine YSF1218 part number. The item is intended as a direct replacement fastener set for F120-series RC glow engines where the original screws are worn, stripped, or lost.

Installation: use the correct driver to avoid rounding the screw heads, tighten to the engine manufacturer's recommended torque values, and apply a removable threadlocker where specified for routine rebuilds. Inspect mating threads and head seats for damage before reuse.

Tuning and maintenance role: these screws secure the cylinder head to the crankcase and therefore are part of regular engine service and rebuild work; correct fastening prevents leaks and ensures consistent compression across runs.