The YS Engine YSG2046 back plate is supplied as a replacement rear cover for engines in the FZ115S family. It is provided as a spare to help restore proper sealing and rear housing alignment on hobby model glow engines.
The FZ115S reference indicates intended compatibility; confirm your exact engine model and serial details with the seller before purchasing. This item is for model engines only and not intended for use in real vehicles.
To install, remove the outer housing while noting how bearings and seals are located, then fit the replacement plate aligning bolt holes and sealing faces. Reapply fasteners to the torque figures specified in the engine documentation and take care to protect bearings during reassembly.
Used as part of maintenance the back plate maintains crankshaft alignment and sealing surfaces. Replacing a damaged plate restores factory geometry but will not change engine performance beyond returning correct mechanical assembly.
Keep a YSG2046 spare when servicing FZ115S engines and always compare the replacement to the original component for accurate fit.
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