Re: 93 40hp Johnson
Sounds like your running on one cylinder. You will need to run a spark test. It should jump a 1/2 inch gap, with a snappy blue spark.<br /><br />If that checks out good, Then I would suspect an air leak in fuel lines. Mabey a broken clamp or cracked fuel line someplace.<br /><br />If no air leak and spark is good and strong on both cylinders. Then I would suspect dirty carbs. <br /><br />Clean and soak real good in carb cleaner and clear all passages with compressed air.<br /><br />Good Luck!
