Regulator Body YSF9166 for YS F91AC Replacement by YS Engine  [YSF9166]

Replacement Regulator Body - YSF9166 Fit

This regulator body is manufactured as a direct-fit spare for the regulator assembly on YS F91AC RC glow engines. It acts as the housing for regulator parts and is supplied to correct fitment and alignment issues in the assembly.

Fitting is performed in a hobby workshop: remove the regulator assembly, replace the body while preserving seals and original fasteners when possible, and confirm alignment and sealing before conducting fuel testing. Do not adapt the component for use outside model engine systems.

The unit is intended for restoration and maintenance rather than to alter engine performance; use it to replace worn or damaged regulator housings or keep one as a field spare.