9.9 SMOKING

gregs

Petty Officer 3rd Class
Joined
Apr 20, 2002
Messages
93
IS IT BEST TO MIX FUEL AND OIL RIGHT TO THE T ? I WAS WONDERING IF MAYBE A LITTLE LESS OIL WOULD BE BEST TO HAVE A LITTLE LESS SMOKE. I'VE ALREADY ADJUSTED THE SLOW SPEED IDLE. IT SEEMS TO BE THE BEST I'M GOING TO GET. THERES NOT A LOT OF SMOKE BUT A LIITLE MORE THAN I THOUGHT THERE WOULD BE. THIS IS MY FIRST OUTBOARD SO IM REALLY NOT SURE HOW MUCH SMOKE IS ENOUGH OR TO MUCH.
 

FlyBoyMark

Ensign
Joined
Apr 14, 2002
Messages
934
Re: 9.9 SMOKING

Stop worrying about the smoke...and worry about the proper fuel oil mix for your engine. Most all 2 cycle smoke a little. They also tend to load up a little when first starting or idleling for a long time. This will make them smoke sometimes a little. NOT ENOUGH OIL MEANS FRIED, DEAD, SIEZED, BROKEN ENGINE. Most all containers of outboard oil tell you how much to mix. I surmise your engine is a newer engine that uses 50:1 or 16 oz. to 6 gal. of gas. Minus a 1/2 oz. at 6 gal. won't fry an engine rite away, BUT always use at least the min. recomended. A little tiny extra oil won't hurt but too much oil can make a 2 cycle engine run hot because there is less fuel and more oil thus the engine will run lean. That's why outboard manufactures recommend that you do not run WOT continuesly during break-in with double oil mix.
 

Fouled Plug

Ensign
Joined
Jun 29, 2001
Messages
935
Re: 9.9 SMOKING

FlyBoy gives good advice, Gregs. Smoke comes with the territory on 2 stroke motors. Use fresh 97 octane fuel, and mix to manufacturer's specifications, and your motor should live a long happy life. :)
 

Bob_VT

Moderator & Unofficial iBoats Historian
Staff member
Joined
May 19, 2001
Messages
26,072
Re: 9.9 SMOKING

Don't you mean 87 octane? I heard that higher octane means higher carbon fouling.<br /><br />Bob
 

steelespike

Supreme Mariner
Joined
Apr 26, 2002
Messages
19,069
Re: 9.9 SMOKING

If smoking really bothers you you could try artificial 2 stroke oil it is said to smoke less<br />and is more friendly to the inviroment. However<br />its not to friendly to the pocketbook.<br /> Spike
 
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