I would suspect vacumm or timing...



"John" wrote in message
...
It can be any of the causes you are mentioning, but disturbance in the
fuel supply is most likely.
Just my experience:
Unless you are very patient, have the service manual, the necessary
tools
and test equipment (peak voltage tester, fuel press indicator,
pressurized
air etc.); leave it to the service guy.
Find one that is well skilled and have experience from that type of
engine. Good luck!
John

"DS" skrev i melding
t.ca...
I have a Merc I/O, probably about 10 years old. It has been tuned up and
has
been running fine. But it tends to stall at idle speed and sometimes
will
stall when you throttle back after running at speed.
Carburetor problem? Dirt in the gas? Electrical? Something simple or
should
I haul it to the service guy?
Thanks.


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