65' Johnson 20HP

[DwayneJ]

I have a Johnson 20hp 1965. I had it running good, but the other day it would not run out like usual. I noticed one of the plugs was fouled so I replaced both of them. Took it back out to the lake and still doing the same thing. Any ideas, also was wondering if there is a fuel adjustment on the motor because I do know it is getting to much fuel. The original owner took the pump off the motor and has ran on an external pump ever since. PLEASE HELP. Thanks

 

[lindy46]

Re: 56' Johnson 20HP

Re: 56' Johnson 20HP

If the motor is a 1956, it is either a 15hp or a 30hp - no 20hp in 1956. Do you have a model number? In any case, could be a coil cutting out and causing your problem. Not sure what you mean by an external fuel pump. A 1956 motor had no fuel pump - ran off a two line pressure tank. Do you mean the PO installed a fuel pump on the motor? Does it have a single line tank now? What else have you done to the motor? Have you cleaned/adjusted the carb?

 

[wbeaton]

Re: 56' Johnson 20HP

Re: 56' Johnson 20HP

1956 had a 30 hp. The 20 hp came out years later. The 25 hp was bumped up to 30 hp in 1955. I think you need to post your model number before we can help you.

+2 with lindy46

 

[DwayneJ]

Re: 65' Johnson 20HP

I do apologize I looked it up and it is a 1965, sorry about that.