Chainsaw Repair

Hi Bob - I'd try some penetrating oil around the crank after installing a puller with light pressure.  Come back the next day and apply a little heat to the flywheel right around the crank and tap the end.  Be sure to use a spare nut on the crank end so you don't booger the crank threads.

Thank You
I soaked with pen oil last night and left the puller on I will try the heat today.
Thanks again

Don't remember how long it took me to get the last P-41 I did took me but I had to resort to some heat. I had the same sort of problem with a 3120XP ended up using 50/50 mix of ATF and acetone, puller and heat to get the bugger off!

The rings MUST be aligned correctly with the locating pin! Most pistons have the locating pin toward the top of the ring groove. The ring must be put on such that the rounded cutout on either end of the ring is aligned with the locating pin.

Not getting what you are saying about the circlip however Nothing should protrude outside the piston toward the cylinder wall. There is a groove inside the piston pin boss where the circlip goes, position the opening in the clip at the 12 or 6 o'clock position.

Here is an article on how to do the clips, is for a motorcycle engine but the process is the same

There is a very small pin in the ring groove of the piston this in the locating pin for the piston ring.
The locating pin is most often mounted close to the top of the groove but could also be at the bottom.
The little rounded notch in the end of the ring faces which ever side of the groove the locating pin is on.
When the ring is compressed into the groove the notch will wrap round the locating pin.

I don't think you are getting what I told you about the clips. If you look closely at your piston, where the piston pin goes. You will see a groove machined into the piston, this is where the clip goes. No part of the clip should be outside the body of the piston!

Look at the attached picture