Thread: 25 hp johnson half speed

Meant to add....put gas in a spray bottle to spray gas when it's messing up. I have diagnosed a many this way. You can also do it with muffs on the motor but sometimes you can't get it to act up unless it is under a load.

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Hey Ichabod,
I really like all the suggestions the crew has already given you. OMC fuel lines are famous for having the fuel line O-ring leak air and cause problems...Just an idea...Good Luck

Check the fuel pick-up inside of gas tank. Mine did that and it was cracked ABOVE the fuel level in tank.

One question. I find a lot of people that are using a 6 gallon tank they close off the tanks air by tighting the cap down so that the gas gets vapor locked and will not run correctly. I seen a man and his boy having this problem this past summer and like to have never got him to loosen the cap. Well when he finely gave up and did loosen the cap the motor did just fine. This could be your problem if the motor is running for the mechanics and would not run for you. Some times it is the simple things that get over looked.

Did not notice this was a 2 month old post. I would like to know if this problem was solved and what was the problem and fix. It could help

me

and

many other fellow boater's in the future. Thanks in advance and sure hope you have fixed the problem.

Go simple first - Bad gas? No way to know so get fresh 100% 89.9 or better. Use the old in lawn mower or pour it out and discard. Mine did exact same thine and bad gas was the culprit! Good luck.

i had this issue on a 92 model evinrude it was the primer lever was sucking air i replaced the diaphragm and the red plunger thing

Originally Posted by ichabod

have had three mechanics work on it ,still has same problem.

sounds like you had three people . lol you got my luck