excessive white smoke

[Offshore_life]

All the suddenly my 2000 yamaha 150hp saltwater series
motor giving out a lot of white smoke. The motor start up
and run fine but excessive white smoke coming from the
the exhaust . Does any know what can I do to resolve
this issue or any info regarding and what cause this
excessive white smoke.
thanks

[99yam40]

have a look at the plugs, I have always thought
white smoke is moisture/water
too much fuel is black smoke
and blue is oil

[Offshore_life]

Thanks i will check the spark plug as soon i get home from work.
When i check the spark plug what should i look for? If water is getting
inside the combustion chamber. What part cost it to leak water in the combusting chamber.

Thank

[muskrat1]

^ what 99Yam said ^

For a 2 stroke, have always followed...

Plug is black - running a little rich
Plug is black & wet - fouled.

Plug is tan - running good

Plug is white - not good. (usually lean condition)

If moisture is present in a cylinder, usually plugs will look 'cleaner' than the others, and tend to be whiter in color.

Keep in mind, moisture does not compress, and if this is the case, hydro lock is a possibility.

[Offshore_life]

after looking at the spark plug they look black.
I forgot to mension that I also add stabile marine
ethonal treatment . little more then recommend .
not sure if that would cause the excessive smoke?
thanks