can anyone tell me the fuel mixture ratio for my 20 hp johnson sea horse? i tried 50 to 1 and that seems too rich and i am getting a lots of smoke any help would be appreciated thanks
Re: 70s 20 hp johnson seahorse fuel/oil mixture ratio
Hello.<br />50:1 is just right,maybe even a bit lean.<br />The smoke you are making might be from a much to rich fuel /air mix in your carburator.Try adjusting your carburator and check both your plugs to see if they have proper spark.<br />Let us know if that helps any.<br />Good Luck.
Re: 70s 20 hp johnson seahorse fuel/oil mixture ratio
That is right, I had a 1969 18 HP Evinrude and a 1976 25 hp johnson that had 50:1 ratio. They both smoked really bad, that is why the new EPA standards are such a good idea.
Re: 70s 20 hp johnson seahorse fuel/oil mixture ratio
Hi Cableman,<br /> Keep running it at 50:1 ratio. You might want to experiement a bit with oils and see if you can lessen the smoke. Some synthetics produce virtually no smoke, but are more expensive. I have run AMSOil in some of my old motors and they seem to like it... just keep the ratio the same as you would with regular oil.<br />- Scott
