1999 Johnson 50HP 2 Stroke J50ELEER: Engine dies in low idle

triple_H

Recruit
Joined
Jul 10, 2026
Messages
3
I have a new to me 1999 Johnson 50HP 2 Stroke J50ELEER on a 24' pontoon. The engine starts fine and runs in high idle but once I lower the idle lever on the controller, it sputters and dies. I have removed both carbs and cleaned and replaced internals with a carb kit. Both spark plugs replaced. All linkage has been reset to factory settings from the manual. Any help would be appreciated.
 

triple_H

Recruit
Joined
Jul 10, 2026
Messages
3
Learning as I go. Just purchased a compression tester and will get you results as soon as it arrives. Thanks
Must have just needed a little bit to get used to the factory linkage settings. It was struggling in low idle when I was running it with muffs at home but have taken it out on the lake twice without any issue!
 

jimmbo

Supreme Mariner
Joined
May 24, 2004
Messages
14,516
Weird, as normally we hear, 'My motor runs great on the Muffs, but the moment it is on the Water, it wont' Idle'
 
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