05-06-2010, 05:05 PM
I am sure its a 2 stroke as in 1979 the only models for mercury motors were 2 strokes, Also mine is a 1979 90hp inline 6 with 3 carbs. I am in the process of cleaning out the carbs and will disconnect the fuel lines and hook them up to my compressor to blow out any junk that may be in there.
From what I have been reading the problem is most likely due to the fact that todays gas contains ethenol which has a lower btu per hour rating about 20 percent lower to be honest. So it stops some of the gas from being burnedfully and causes things to varnish faster.
The other problem is also due partialy to the ethenol is vapor lock
But I get a new starter put on tommorow and I will once again test it on my lake to see if all is well'
Thanks for the help if you can think of anything else I would always appreaciate it.
From what I have been reading the problem is most likely due to the fact that todays gas contains ethenol which has a lower btu per hour rating about 20 percent lower to be honest. So it stops some of the gas from being burnedfully and causes things to varnish faster.
The other problem is also due partialy to the ethenol is vapor lock
But I get a new starter put on tommorow and I will once again test it on my lake to see if all is well'
Thanks for the help if you can think of anything else I would always appreaciate it.