Fave chainsaw played up t'other day - had been using for an hour or two -
all as normal - then starting dying when should have been idling - i.e. make
a cut release throttle trigger, and revs drop down and .....conk.

Would restart -on full throttle - and OK at revs but conked again when
returning to idle.

Next day the fecka won;t start at all.

Had plug out, bit sooty but cleaned up OK, magneto creating a spark - felt
through fingers from plug lead, quite hard to see spark on plug tho??

Fuel OK (other backup saw running well on it), after trying to start (again)
plug/cylinder is wet so presume fuel getting there.....

Has a decompression system to start and is hard to pull without using it so
assuming compression OK.....

Will get a new plug - anything else?

Recently it was stored on it's side overnight due to persistent chain oil
leak - could this be related?

TIA
Jim K