How much smoke is ok?

[tonynoriega2]

While testing my 1955 Evinrude Fleetwin 7.5, I am noticing a fairly good amount of smoke. It isn't consistent and only lasts for about 5-10 seconds after start but its there.

I am going 50/1 mixture.

It hasn't ran very much over the past few years so am just wondering if it is kind of "cleaning" itself out.

Also, in my testing tank, there is quite a bit of oily gunk forming around the rim, normal output from old outboards?

thx all.

 

[Bosunsmate]

Re: How much smoke is ok?

Normal normal normal

 

[jimmbo]

Re: How much smoke is ok?

I believe that engine uses bushings not needle bearings in the wrist pins. If that is the case then 16:1 would be the recommend ratio. If I am wrong and the engine does have bearings in the wrist pin then the mixture is 24:1.

 

[nwcove]

Re: How much smoke is ok?

if ya go to 50:1.....the engine will definitely stop smoking in short order. you will destroy it. spend the extra few bucks on high quality oil and stop worrying about a bit of smoke !! jmo

 

[jimmbo]

Re: How much smoke is ok?

Besides, on cool windless days consider it Mosquito Control

 

[71Windsor]

Re: How much smoke is ok?

Two stroke out boards were not big on emissions lol. Let her smoke its ok.

 

[boobie]

Re: How much smoke is ok?

I'd use 24:1 in that motor. And as said above, let it smoke. Besides that it smells good.