On Wed, Mar 24, 2010 at 09:21:52PM -0700, Brian Kemp wrote:
> I had new gas and mixed the oil as I've done for years. After about 10
> minutes of use with the brush cutter, suddenly the trimmer lost power
> and stalled. I found I could go to full choke, pull the cord, then go
> the half choke and pull the cord and have it run normally for a few
> minutes. No choke and it died. Once I hit a heavy patch of brush, it
> would loose power and only idle. If I pulled the throttle it would
> stall. I repeated this several times, with a shorter run period each
> time till I couldn't make the engine run.
Classic symptoms of a clogged fuel tank vent.
Other possibilities in descending order of probability:
-partially clogged jet in the carb
-leaking crank seal or some other leak allowing air into the cases
-stuck rings/partial piston seizure
if its the latter then it'll be easier to pull but hard to start
because the rings won't seal as well.
Eric
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