Johnson/Evinrude sells products that are tested and known to be safe for use in
their outboards. Using something you are not sure of even once could do plenty
of damage. For example, using automotive carb spray in some outboards will
strip the protective coating from the inside of the carb then it will corrode
and poof. Why chance it?

Water separator filter on an outboard with a portable gas tank?

"Gfretwell" wrote in message
...
Is the
mfr concerned that...

I suspect that most of these magic potions are little more than a nickle's
worth of mineral spirits in a $3 bottle but I also bet that the engine
manufacturers are more worried that they may contain "hotter" distillates
that
could attack plastic parts in the fuel system.
Since gasoline is a fairly powerful solvent itself I am not sure what an
additive would do. Just run a good water separator filter and burn the gas
in
your boat, don't just store it there. ;-)

Water separator filter on an outboard with a portable gas tank?


I'm sorry, I guess my answer was overly broad. I was thinking about all the
crap people dump in their installed tanks.
The idea that a manufacturer wants to limit the chemicals his fuel system must
endure is still valid.

In article ,
reg (Gfretwell) writes:
| Water separator filter on an outboard with a portable gas tank?
|
|
| I'm sorry, I guess my answer was overly broad. I was thinking about all the
| crap people dump in their installed tanks.
| The idea that a manufacturer wants to limit the chemicals his fuel system must
| endure is still valid.

Also, isn't the gubmint in the form of the EPA involved? Whose problem is it if
a motor fails emissions testing with a tank laced with mouse milk?
--

Del Cecchi

Personal Opinions Only

99% of the gasoline additives are junk and carburetor cleaner is only good
for killing bugs. They do nothing to remove the varnish, or buildup. Fuel
stabilizer does work, and if you have gasoline and water use anhydrous Ethel
alcohol to remove the water.

Jack

"Doug Kanter" wrote in message
...
My 1996 15 hp Johnson 4-stroke manual says "no gasoline additives". Is the
mfr concerned that some users might not measure correctly for a small fuel
tank, dump in the whole bottle of STP, and screw things up? Or is it
likely
that even a carefully measured amount would cause real harm if used once
or
twice per season?