Topica Loopframe_Guzzi Archive


Subject: RE: Not there yet (Lannis' Carbs)

Author: Lannis

Date: Mar 25, 2004, 3:55 PM

Post ID: 1716399164




joe jump wrote:
 
Lannis,
I'm sorry that the recommended cleaning didn't help; I'm
sure your frustration is mounting. Well, there has to be a reason why
it's running so poorly! One way is to determine what's wrong by finding
out what is right. It certainly sounded like you weren't getting enough
fuel... is the fuel ok, i.e., reasonably fresh? I'll assume that the
tank vent is clear as well as the float bowl vents, and the petcocks are

flowing fine. Are the float bowls filling with fuel? With the bowl off &

petcock turned on, does the fuel flow fine through the float valve? Are
you sure the accelerator pump piston is installed into the jet holder
right side up? That would be the flat end that has the 4 holes is facing

up. If installed wrong side up, the check ball will prohibit fuel flow.
If everything checks out, then it isn't your carbs.

Joe -

Gas is fresh, tank is vented, fuel flows nicely (clear fuel lines, you
can watch it happen). Fuel runs quick through float valve with bowls
off. Plugs stay wet with gas.

The accelerator pump piston is installed with the 4 little holes "up";
blowing through it both ways showed that the check ball is working.

 It's been said many times before...most carburetor problems
are in the ignition.

Compression first, spark next, gas last; it's been my mantra from years
of Britbiking, but the symptoms in this case have been so carb-like I
ignored my own experience.

Compression and electrics night tonight. I'll go work for a few hours
and then come in and whine some more .....

Lannis

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