Topica Loopframe_Guzzi Archive


Subject: RE: STARBOARD

Author: Tom Bowes

Date: Apr 6, 2003, 8:41 AM

Post ID: 1712524052


The larger bore on one side is probably due to the relative lack of
quality control and is likely not going to create the problem you
describe. Look, Bob, the right side is running OK, which means that
whatever is causing the problem with the left side has to be exclusive
to the left side. Is your left plug blackened and sooty? Or is it white
as the driven snow. One indicates too much fuel, with spark, the other
too little fuel and/or no spark. Is the left plug wet after you crank
the engine? If so, the problem could be (in order of likelihood):

1) Choke problem. Choke cable too tight or misadjusted. Or the left side
choke plunger is stuck, or its rubber seal is so hard from age that it
wont seal any more, or the enrichener jet is crudified on its sealing
surface and needs a cleaning.

2) Bad plug, plug wire, plug cap, or distributor cap. Substitute or
swap, to determine which.

3) Carb slide is installed backwards. The flat side goes toward the
engine.

4) Carb top gasket is kaput.

5) Carb is thouroughly crapified and needs to be rebuilt.

6) Valves too tight on left side.

As for coils, it really doesn't matter, so long as they have an internal
(or external) ballast resistor. The fact that your right cylinder is
working suggests that the problem is not the coil. But, if you really
want a new coil, the Bosch "Blue Coil" as used on a 1972 Beetle works
great.

3haw-@bluefrog.biz wrote:
 Measured the intake manifolds on my Ambo. The port measures 1.15 in and
the starboard measures 1.25 in. Could that have anything to do with
starboard side not firing? Seems doubtful as carb controls how much air
goes in.
Also, I found that the coil on my Ambo is not a Marelli but a 12 volt
coil from a Chrysler product. If I were to purchase a new coil what
would I ask for at an auto parts store, just some Chrysler coil or would
any old 12 volt coil do? Thanks, Bob



Tom

Shelby Township, MI

Early '70 Ambo
1980 G5 (for sale)
1982 V50III
2001 Cal Special

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