1989 120 Johnson little smoke and oil/gas at idle

countvlad

Chief Petty Officer
Joined
Jun 29, 2009
Messages
439
Hi everyone
i figured the carbs might be dirty so i did a decarb with seafoam per Joe Reeves... wot improved.. idle etc but for some reason still smokes a little at idle and spits out small amount or either oil or gas out of the exaust... i can definetly see the oil/gas water patches.... one of the other things that i've noticed is that the water coming out of the tall tale is not warm but rather cold....

so i assumed after reading about this issue that either my thermostats are not closing resulting in incomplete combustion or the recirculation valves are plugged..... am i on the right track??

for a 120 1989 is 20 psi water pressure at WOT normal??? thank you
 
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