YS Engine YSS1017 O-ring Set for Engine Back Plates  [YSS1017]

YS ENGINE BACK PLATE O-RING 50ST #S1017
Price:
£3.63
Brand:
YS Engine
Model:
YSS1017
GTIN:
4560105739695
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Replacement back plate O-ring set

The YS Engine YSS1017 back plate O-rings are intended as replacement seals for RC YS engine back plate joints. These parts should be considered consumables and replaced when sealing surfaces show wear during engine rebuilds.

To replace, remove the back plate and check the sealing groove for contamination or damage. Fit a matching new ring from the set, ensuring faces are cleaned and the O-ring is properly seated. Use the lubricant recommended in your engine documentation to assist fitting and reduce the chance of tearing.

New O-rings help retain crankcase pressure and reduce the risk of fuel or oil leaks that can disrupt engine consistency under varying operating conditions.

Will new O-rings change engine running or tuning?

Fresh, correctly sized O-rings restore proper crankcase sealing and can improve idle and throttle response by eliminating leaks that upset fuel metering and pressure balance.

How do I tell if an O-ring is failing?

Look for signs of hardening, cracking, flattening, or visible leaks around the back plate. Any of these indicate the ring should be replaced to avoid running problems.

Is it acceptable to reuse the original O-ring after inspection?

If the original ring shows no damage, no hardening, and still seals correctly, reuse is possible; however, best practice is to fit new rings during rebuilds to guarantee a reliable seal.

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