Quote:
Originally Posted by lietuviai
I actually used both O-rings. I stuffed the brown one inside the bore and put the black one on the outside of the bore on the piston side. I couldn't find anything more specific than what was in the previous links so that's what I did.
It's all re-assembled and installed now. I haven't tried starting it yet but I'm sure it should be fine.
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If the Piston actually comes to rest on the O-ring it will limit your Piston Travel a little and eventually the O-ring getting squashed will have an effect on it.
If the Piston does not touch the O-ring it may never be a problem.
Were the 2 O-rings the same size?
The typical problem when there is an issue with that O-ring is Fuel gets into the Engine Oil.
However, 2 members have claimed the Engine Oil from inside of the IP mixed with the Fuel when that O-ring was no good.