YS Engine YSS1017 Back Plate O-Rings 50 pcs Seal Rings for YS Engine  [YSS1017]

Backplate O-ring Set

The YS Engine YSS1017 backplate O-ring set supplies nitrile sealing rings intended for the back plate area of RC glow engines. The bulk pack is aimed at routine servicing and rebuild tasks.

Practical overview: these O-rings help maintain crankcase pressure and prevent fuel or crankcase leakage that can disturb idle quality and throttle response. They are replacement items for upkeep rather than components that influence engine output.

Fitting notes: inspect removed O-rings for flattening or cracking, lightly oil replacements with a compatible lubricant before seating, and verify the back plate and mating surface are clean to avoid pinching or early degradation.

Supply count is 50 pieces as stated in the product name to keep a ready stock for regular servicing.