On Apr 17, 1:04*am, Oren wrote:
On Wed, 16 Apr 2008 19:30:10 -0700 (PDT), Manjo
wrote:





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

Examine the spark plug or just replace it. Check for fuel /air mixture
adjustment. Make sure air filter is clean.

Compare sprak plug to this chart.

http://hawkworks.net/sparkplug-chart/- Hide quoted text -

- Show quoted text -

Sorry, forgot to reply to additinal tips:

I get the same engine dying with and without the air filter in place.

As for spark plug color, the new spark plug looks a bit oil covered,
but I'm guessing the shiny look is more form unburnt gas, but I'm not
sure.

Manjo