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  1. R

    Carb float height

    Quick question for you carb gurus. I have a 1996 J 40 hp. If the float height is set too high, Would that allow for too much gas and cause a rough idle? My motor runs fine at 1500 rpm and higher but idles very rough. After rebuilding both carbs I am second guessing every step I've done. I...
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    86 Johnson idles rough, Rebuilt carb then something curious happened...

    Ok, So I have 1996 Johnson 40hp. Didn't start for two years. So I rebuilt the carbs. Started it up, Idles rough but runs fine after 1500 rpm. I did some research on this forum and realized that I overlooked the core plugs during the rebuilds. Took the carbs back off rebuilt the core plugs...
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    1996 Johnson 40 hp idles very rough

    All I have a 1996 Johnson 40hp. The motor was not run in two years. The motor fired up and idled rough from the beginning. So I rebuilt both carbs and ran OMC engine tune through the service valve. After rebuilding the carbs she still idles lousy. I did a carb adjustment according to...
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    1996 Johnson 40 HP WOT 6400 RPM

    All, I have a good understanding of props as far as RPMs/pitch and diameter. However, This one is tricky. Just rebuilt a 16' Privateer bay boat. I have a 1996 40hp Johnson with an aluminum Turning Point 12 1/4 X 15 prop. I put a CMC trim/tilt bracket on. The bracket sets the motor...
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