smoke in carb

[jayandzach018]

1981 mercruiser 120.. i am testing my motor and i dont have the cover over ther motor and when i am at idel you can see smoke ot of the carb? now i dont have the engine cover or the air filter.. so my ? is, is it ok to have smoke come out of the carb?

 

[Maclin]

Re: smoke in carb

Could be blowby coming from the valve cover vent hose that goes up to the carb or spark arrestor. I am not sure yours is plumbed that way but if it is and the engine is old then crankcase vapors would be my main suspect.

 

[jayandzach018]

Re: smoke in carb

for some reason the motor never gets hot it only goes to 50 and motot is always cold not hot

 

[wewefirex2x]

Re: smoke in carb

just a thought but if the motor was winterized and you used fogging oil. I could be burn off of the fogging oil. just a thought...

 

[jayandzach018]

Re: smoke in carb

the guy i bought it from out the wrong spark plug and it broke the pisting so i replaced the pistin but i dont know if that has something to do with it? i know its not buring oil and there is no water in oil too