Running Rich?

J

jgm7739

Cadet
Joined
Jun 12, 2003
Messages
28
I have a 1986 115 Yamaha (oil injected) that I believe it to be running a bit rich. She smokes an aweful lot on idle, and for the most part, idles fine. But however, at times a bit rough. I've been using Yamaha approved oil. I have yet to pull the plugs, but I assume that would be a good start. How can I remedy this situation?
 
D

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: Running Rich?

Your headed in the right direction as for the first step. Replace the plugs with the correct ones as recommended by Yamaha. Not "as good as" or "about the same thing". I believe they should be NGK's.<br /><br />Good luck!
 
J

jgm7739

Cadet
Joined
Jun 12, 2003
Messages
28
Re: Running Rich?

Thanks for the tip, but is there an adjustment for the oil/fuel mixture? Is this something I would want to delve into, or should I let a professional mechanic handle it?
 
F

Fouled Plug

Ensign
Joined
Jun 29, 2001
Messages
935
Re: Running Rich?

I would start with new plugs. Yamaha also makes an excellent fuel additive that decarbons engines. The name escapes me at the moment...Ring Free? Anyhow, try plugs and see how it goes before looking for other remedies.
 
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