outboard problem

[Todd2]

I had a similar problem last year (or the year before) and a bottle a Sea Foam cleared it up.

[zx150]

Yamaha makes a product called Ring Free I use it every time I put gas in the boat. I would not use anything else. That is what is recommended it is a bit more than Sea Foam.

[jackhammer]

I use ring free on just about every fillup. I aslo use sta-bil for any water that may be in the gas. I really think my problem is something else.

[geobass]

Ring free is great to use everytime. But is sounds to me like it is the plugs. I would change them and see if it helps.