YS Engine YSF5113 Valve Cover Screws for FZ53 FZ63 RC engine valve cover fasteners  [YSF5113]

Valve cover screws for YS FZ53/FZ63

This RC-scale replacement pack contains the valve cover screws intended for use on YS FZ53 and FZ63 model glow engines. The screws are intended as direct replacements for the fasteners that secure the engine's top cover, helping maintain proper sealing and part alignment during normal use and service.

Use these screws when performing routine top-end service, such as removing the valve cover for inspection, gasket replacement, or when reassembling after maintenance. The parts are designed to match the thread form and basic fastener role found on the specified YS engine models.

Installation notes

• Remove the valve cover carefully to avoid damaging the gasket, note original screw positions if they differ, and clean contact surfaces before reassembly.
• Hand-start each screw to avoid cross-threading, then tighten progressively and evenly to seat the cover without over-torquing.
• Check valve cover sealing after the engine reaches operating temperature during a short test run, and retorque if necessary following cooling.