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My 2008 Tohatsu 3.5 four stroke outboard (MFS3.5) stalls if let run on very slow idle.What can I do to stop this. The plug is new, carb slow idle jet was removed and cleaned.
Did you do a complete disassembly and 4-hour soak in real carb dip, such as Tyme, followed by a warm water wash-out and a good blow out (either with compressed air or carb spray)? If not, you probably still have varnishing in the low-speed circuit. Especially since you found junk in the main jet. After you are 100% sure that you have really done a very thorough job on the carb, reassemble everything, and then adjust the warm idle per the specs in the Factory service manual, using a good shop tach. If you still can't achieve a slow enough idle, and everything else (including the spark plug) is in perfect condition, the carb may to be replaced.
