Thanks for the replies, I will try the Merc or Evinrude fuel additive. I
have also heard that SeaFoam works for some folks. I have always used stabil
in the gas. A Harley friend of mine suggested using a Briggs & Stratton gas
preservitive instead of stabil. It has a mix of 2 components and has 2 mix
levels, 1 for storage, i.e. over winter and one for limited operation, i.e.
summer. A lot of Harley guys in Wisconsin use the Briggs fuel preservative
and report improved results over stabil. BTW we have 10% Alchohol gas
here )Wisconsin) near the urban areas too which sux, but I travel for the
100% gas for my boat motor. Aslo, I have tried Regular, Mid, & Premium with
no noticable difference in performance. The manual (1972) says to use
regular or premium?? Regular is cheaper so that's easy, but any thoughts
from others? I can't detect any pinging with regular, but??

Thanks again for the replies,

Steve - 72 Johnson 50, 50th Anniversary dual carb.




"sherwindu" wrote in message
...
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