Sea Foam is similar to Stabil, but has the added ability to clean the carbs. I
have had some success with Sea Foam, but better luck with a product like Mercury's

Quick Silver fuel additive. Some of these products will actually break off dirt
inside
your gas tank and fuel line contributing to the problem. A rusted or dirty tank
should
be cleaned or replaced. An extra inline filter from the gas tank is a good idea.

Sherwin D.

wrote:

I know several mechanics, that swear by "Sea Foam" . Some say it's the
best they've ever used.
YMMV

http://www.seafoamsales.com/motorTuneUpTechGas.htm

Roadrunner Newsgroup wrote:
Can anyone recommend a good carb cleaner fuel additive that works? I try to
run out all my fuel after use (with stabil in it) but I would like to know
if there is an additive that can remove the gum from the idle circuit and
float needle that eventually builds up. I have a 1972 50hp Johnson and I
have rebuilt the 2 carbs but it is starting to get a little gunked up again.
It's been 4 years since the rebuild. It is a freshwater Northern boat that
sits for the winter. One of the 2 float needles seems to stick and free up
now and then. Unfortunately it only gets used about 25 hours per year.

Thanks in advance,

Steve