1968 Johnson 40hp Carb leaking out the front when primed???

[Jermbo420]

I have cleaned and got a kit and new float for this carb and it's still poring gas out the overflow when primed, then when I try to start it gas pours out the front of the carb itself... I could use some help on this I can't seem to figure it out I've took it off three times allready:mad-new:

 

[kevinwd1]

Re: 1968 Johnson 40hp Carb leaking out the front when primed???

I had similar problem and after checking all obvious possibilities it turn out to be a block carby bowl vent .Anyway read through these threads .
http://forums.iboats.com/johnson-evinrude-outboards/carby-issues-1962-28hp-johnson-618767.html

http://forums.iboats.com/johnson-ev...p-johnson-carby-bowl-vent-postion-619179.html

 

[kfa4303]

Re: 1968 Johnson 40hp Carb leaking out the front when primed???

Sounds like it might also be a stuck float needle valve. Here are some great links on rebuilding carbs of this era that may help.

Reviving a Vintage Big Twin - Part 1
5.5 HP Evinrude Johnson 1954-1954 Carburetor Tune-Up Procedure

 

[Jermbo420]

Re: 1968 Johnson 40hp Carb leaking out the front when primed???

Thanks for the help, it turned out that the new carb kit came with a gasket for the bowl that was too thick and was making the float stick open. I solved that problem and of course now I have a new harder to solve problem... I took the lower unit off to install a new impeller and this is the electric shift motor well the wiring had been replaced to a certain point and I couldn't figure out how to unplug it and well when I dropped the lower unit it ripped the shift wire out the top of the unit does anyone have any idea how to fix this???

 

[kfa4303]

Re: 1968 Johnson 40hp Carb leaking out the front when primed???

Ahhhh, the dreaded electric shift models. I've never had to deal with them personally, but I hear it's not a whole lot of fun, unfortunately :/ Hopefully, it will be as "simple" as splicing/replacing the wire. someone with a bit more expertise will be able to help you out shortly, I'm sure. Good luck.

 

[Daviet]

Re: 1968 Johnson 40hp Carb leaking out the front when primed???

Is the wire repairable, you can still get a new one,#383595, you will not like the price.

 

[Jermbo420]

Re: 1968 Johnson 40hp Carb leaking out the front when primed???

Yea i found one on marine engines website for $200 and i sure don't want to spend that much if i can help it but when i took the very bottom off the lower unit it looks as if there is a seal that goes over the wires and stops the oil from mixing with the water... Hell the wire is pulled out but can't get the seal out.