Thanks AVB
Pressure and vacuum testing appears to be a little beyond my ability and tool box. I though I would take a few bits off from it today and see if there are any obvious leaks around the crankshaft seals. Hopping they were pressed on from the outside maybe I could just relace them. I have had this thing apart before (new fuel line) and it is a little challenging getting it back together so I have been dragging my feet a little.
I noticed the spark plug was loose. Tightened it up and the saw ran perfectly. Thinking it must be Christmas I put the bar and chain back on put some oil in and found a log. Saw started but would not run. It ran as though it was flooded initially but just would not clear itself. Full throttle was getting about half revs with a small amount of stuttering. When it got warmed up it would idle.
Back to the shed thinking that a little mixture adjustment would be the answer. Nothing seemed to improve it, and after several adjustments it would no longer start, would fire but would not go. Now it does not even fire. I seem to have lost spark, when I first tested the spark it seemed OK but I thought possibly a little erratic, so I tried it again and now I get nothing.
Certainly gives me a new avenue of possibilities. I will take a few bits off next weekend and hopefully find something simple is wrong with it.
