On Apr 17, 1:00*am, "S. Barker" wrote:
try it with the gas cap off.

s

"Manjo" wrote in message

...



I have a leaf blower that uses a 5 hp B&S "L" head engine. *The carb
is pretty simple with a choke butterfly, throttle butterfly, and
rubber diaphragm fuel pump. *The carb sits on top of the fule tank.
The carb has no bowl. *The governor linakges are clean and the
governor appears to be working fine.

The leaf blower was starting to run poorly last fall. *This spring it
started right up, but after4-5 seconds after running smoothly at
proper speed, it will slowly loose rpms and finally stop after 15-20
seconds.

I have cleaned the pick-up tube, replaced the carburetor diaphragm
fuel pump along with the gaskets between the carb and the fuel tank,
and the gasket between the carb and the engine. *I've also
disconnected the engine ground wire that normally kills the engine
when the throttle is tuned full off. *But after doing all this the
engine still will not stay running for more than 30 - 40 seconds.

Thanks in advance for any tips, suggestions, or coments.

Manjo- Hide quoted text -

- Show quoted text -

s,

I don't think it's a gas tank vacuum problem. I did remove the cap
completely and got the same symptoms with no changes (engine ran for a
little while then slowly died).

Manjo