1982 v150 excessive smoke

[fishingdan]

Compression is good and even across all cylinders (118-120). Carbs are clean and fuel is good. When running on the muffs, I see much more smoke than I like. It isn't the typical blueish 2-stroke exhaust. The smoke is whitish/greyish. Give it a quick throttle and you get a fresh batch of smoke. I would guess that cooling water is getting into the exhaust somewhere. Any suggestions on where I start looking?

Thanks,
Dan

 

[j_martin]

Re: 1982 v150 excessive smoke

Compression is good and even across all cylinders (118-120). Carbs are clean and fuel is good. When running on the muffs, I see much more smoke than I like. It isn't the typical blueish 2-stroke exhaust. The smoke is whitish/greyish. Give it a quick throttle and you get a fresh batch of smoke. I would guess that cooling water is getting into the exhaust somewhere. Any suggestions on where I start looking?

Thanks,
Dan

Pull the plugs and look at them, as well as in the bore. The super clean one is the one where the trouble is. (steam cleaned)

Could be head gasket. Could be base plate gasket. If the exhaust side of the piston in question is cleanest, could be a crack in the exhaust divider plate, or a gasket on it.

I've even heard of a pinhole in the aluminum cylinder clear through.

I don't know where you live, but the scary thing is sometimes an obstruction will not let the block completely drain and water in it freezes during the winter.

hope it helps, and I hope it's simple.

John

 

[fishingdan]

Re: 1982 v150 excessive smoke

Thank you for the information. Wouldn't some of these have a negative impact on the compression test numbers?

Thanks,
Dan

 

[j_martin]

Re: 1982 v150 excessive smoke

Thank you for the information. Wouldn't some of these have a negative impact on the compression test numbers?

Thanks,
Dan

Not neccessarily
John