"W. eWatson" wrote in message
...

I've had Subject trimmer for ten years, and of late it has been hard to
start. I've probably yanked on the cord about 80 times this morning, and
a few times it sputters and dies. I've had it in choke and run
positions. Usually run gets it going. The outside temp is 62F. The
little transparent fuel clear bulb has lots of fuel in it, as required.
There is a bubble in it that may be 1/2" in diameter. I used it the
other day for 30 minutes.

This normally happens when carburettor components
(diaphragms or springs) are sufficiently worn that they
no longer meet system specifications. The OP did not
say whether his carburettor was ever serviced in 10 years.
Miniature carbs like this do not last for ever.

--
Don Phillipson
Carlsbad Springs
(Ottawa, Canada)