07/15/2026
Had the pleasure of working on my first boat. 1984 Johnson 40hp outboard 2 stroke. It was not running right at idle and full throttle.
Took the carbs off and cleaned them really well in the ultrasonic cleaner. It ran but was backfiring. Pulled the flywheel off and found the issue. Woodruff key had sheared in half.
Installed new key and put into ignition time and wot time. Synced the carbs and it’s running like a champ