Chainsaw Repair

Thanks Killian
The pictures are great I have the rings on the piston and the saw reassembled but I don't remember if  the little notch on the ring that goes against the pin is facing up as in your picture or if I have it facing down, does it matter as long as the ring is in the groove and up against the pin?
The circlips are in the groove but unlike the ones in your picture, mine were the clip ends meet stick out at a 90 degree angle it is not protruding past the piston but is close were as yours curl up.The clips came with the piston I see no way of installing them with 90 degree prongs facing into the piston.
Thank you for all your help.

Thanks 660
I will have take the cylinder head off and recheck. Should have better paid attention the first time.
Thanks for all the help.

OK, Bob, now I understand! Those type of clips were used a long time ago on motorcycles (Ossa, Bultaco and Montessa) the little 90° bends on the ends were an attempt at 'locking' the clip in the groove. You basically grabbed the clip with bent nose pliers, compressed it very gently, inserted the bottom of the clip in the groove and then compressed it a tiny bit more so that the top of the clip could be pushed into the groove with a small punch. IIRC, the Spanish bikes used a very thin walled piston pin that would aid in this.

Your saw is from the time period when this method was common so, I can understand from where your frustration comes.

Tim