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40 hp johnson won't idle when tank is less than half full.
any thoughts would be greatly appreciated.
couple months ago my wife and i bought a pontoon with a 1998 johnson 40hp
we have had it out on the lake 5 times now.
it runs great from idle thru wide open throttle when the gas tank is full down to about a half tank.
after the tank is half full or less it runs great above idle but does not idle good, keeps cutting off then is hard to restart.
here is what i know about the engine's history
2 months ago the carbs were rebuilt and adjusted
new plugs
new fuel pump
new fuel line and primer bulb
new fuel filter
tank is 12 gallons, vent is open
fresh gas
seafoam was added to my last tank of gas.
idle speed seems ok
compression hasn't been checked
many thanks
any thoughts would be greatly appreciated.
couple months ago my wife and i bought a pontoon with a 1998 johnson 40hp
we have had it out on the lake 5 times now.
it runs great from idle thru wide open throttle when the gas tank is full down to about a half tank.
after the tank is half full or less it runs great above idle but does not idle good, keeps cutting off then is hard to restart.
here is what i know about the engine's history
2 months ago the carbs were rebuilt and adjusted
new plugs
new fuel pump
new fuel line and primer bulb
new fuel filter
tank is 12 gallons, vent is open
fresh gas
seafoam was added to my last tank of gas.
idle speed seems ok
compression hasn't been checked
many thanks
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