Fuel Pump prob...

mherndon

Seaman Apprentice
Joined
Jun 8, 2011
Messages
47
I don't know for sure, but i am leaning towards the fact that I may have a bad fuel pump.

1982 115 hp johnson has been giving me problems for some time now. At WOT it looses a LOT of power and is hard to get to plane out again. After a while, started priming bulb while we were moving and it was giving us problems. It worked better but was still "choking." Good compression, brand new primer bulb and lines from tank to motor, sqeaky clean carbs... the whole nine yards.

Well, when i first got it, i had trash in the tank and didn't know it and it clogged the lines. I found this out because the primer ball was all the way depressed. I cleaned the tank and no more depressed ball. So I thought I had an AWSOME fuel pump and that it was working great!

Can it still be bad. I know I can buy a vaccum tester but is there anything else that it could be? I checked all the linesin the motor and they seem fine without leaks. I was planning on replacing those also. Can I just pick up some 1/4" fuel hose from autozone or does it have to be marine hose?

Thanks!!
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,226
Re: Fuel Pump prob...

Tank anti-siphon valve??? See, a vacuum tester would save a lot of guess-work.
 

jayyyy

Seaman
Joined
Jul 17, 2011
Messages
52
Re: Fuel Pump prob...

On a motor of that vintage if the fuel pump has not been replaced it probably should be. The newer fuel formulations hard on those older pumps. I had similar symptoms on a 1983 115 turns out fuel pump was shot. You can get a brand new Sierra brand for around $50 and they have updated materials to handle todays fuels.
 

mherndon

Seaman Apprentice
Joined
Jun 8, 2011
Messages
47
Re: Fuel Pump prob...

On a motor of that vintage if the fuel pump has not been replaced it probably should be. The newer fuel formulations hard on those older pumps. I had similar symptoms on a 1983 115 turns out fuel pump was shot. You can get a brand new Sierra brand for around $50 and they have updated materials to handle todays fuels.

I was looking at them and found a Sierra and an OEM. Which would be a btter buy? At first, I thought the OEM... plus, it was $5 more. But the "updated materials" aspect of the Sierra makes me want one of those! lol!

I also borrowed a vaccum tester last night from someone so I will give you an update... hopefully tomorrow night!

Thanks again!
 
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