Replacement Disc Valve Pin Screw YSG2049 for YS Engine FZ115S  [YSG2049]

Part summary and typical use

The YS Engine YSG2049 disc valve pin set screw secures the disc valve pin on YS FZ115S disc valve engines and acts as a small replacement or spare fastener when servicing the disc valve assembly on model aircraft and other RC platforms using the FZ115S engine.

The part's purpose is to provide dependable threaded retention so the disc valve plate and associated parts remain properly indexed during operation. When carrying out maintenance or parts swaps, make sure the screw is seated correctly and check the valve plate alignment before final tightening.

Installation guidance: open the engine service access, align the disc valve pin, insert the set screw, and tighten by hand before finishing with the appropriate driver until snug. Avoid excessive torque and confirm free movement of the valve plate after fitting. Keep spare screws for field repairs.