Johnson 50 hp 1996 ran well then died.

[janul15]

Hello All. My outboard has been out of action for a couple of years. Replaced a lot of electrical components. Replaced fuel, cleaned carbs (probably not properly), engine started a few days ago. Ran well for a while, at a mid-speed. When I powered down, the engine cut out. This happened a few times, but I managed to start it with some difficulty. The last time this happened, I couldn't start it again, had to get a tow home. Still no start. Checked drain plugs, plenty of fuel in carburettor bowls. Any ideas? What to check/do next?

 

[flyingscott]

Check compression. did you replace the water pump along with all the other parts?

 

[iggyw1]

Revisit your carb clean out. Don't use the cheaper Japanese parts. Use original equipment parts. (I'm talking thru experience here with the cheap parts).

 

[janul15]

Thanks for your advice. I have taken off the carburettors and will clean as well as I can. Can someone tell me what the primer lines to the carburettor do, and how do I check that that system is working? Pumps water well, so I don't think anything wrong with water pump, will check compression when I can.

 

[racerone]

The electric primer replaces choke flappers.----The electric primer is a valve.----It is not a pump.-----When you push in the key while cranking it opens.----The fuel pump provides fuel to the open primer valve.----This fuel then goes directly into the motor and bypasses the metering circuits in the carburetor.----It is used only for starting.-----It works very well.----The red lever is for manual operation of the valve.-----Yes this motor can be started with a dead battery and by using rope on the flywheel.