Chainsaw Repair

Impact=no piston stop
Rope=by hand breaker bar

Piece o' cake!

1/2-inch impact on lowest torque setting with a 19mm deep impact socket on and a few blips of the trigger, and it came right off.  Kept the spark plug in, by the way.

Thanks guys for the great advice.

Seems to be leaking bar oil from behind the chain tensioner.  I cleaned it up really well with compressed air and brake cleaner and that is where the oil seems to be dripping from.   What would cause that?  I thought it would be the oil pickup hose, but that seems fine.

Did you say it is leaking oil from behind the chain tensioner, if so is there a crack in the case behind the tensioner.   Pull the tensioner out and look at it with a magnifier.

Most chainsaws dribble a little oil while setting on the shelf for a while

It's not a dribble.  More like a mess.  It's leaking from two places:

The vent and the oil pump itself.  Looks like the plastic cap on the end of the oil pump bore where the oil is coming out of the pump.

Thanks for the tip on looking for a crack behind the tensioner.  This saw was used daily by an old tree cutter friend of mine and by the looks of it, it's been just a tad beat, so a crack would not surprise me.

I'm just going to order a new pump unless I can find o-rings for existing pump.