92 Johnson 115 aux fuel pump problems

[8lbCalico]

Hello, been a while since I posted and had a few fuel delivery questions.

I have a 92 Johnson 115 that has been having some fuel delivery problems. I'm about to replace the fuel/water separator the fuel filter under the cowling the primer bulb and fuel line from the fuel sep to the motor. I thought there may be a problem with the main fuel/vod pump which happens to be $408 locally and went into a panic. As it turns out there is an auxiliary pump mounted along the gunnels from the fuel tank located below deck. This pump does not seem to be working, or at least I have never heard it running and simply turning the motor over real quck did not produce any results.

Questions:
1. Is this aux pump necessary due to the 3 ? 4 foot drop from the main pump to the tank?
2. Should this aux pump be connected to the ignition switch in the on position, or a seperate switch?
3. In a pinch can I bypass this pump and run straight to the fuel/water separator?
4. Finally what pump would you recommend as a replacement if that is the answer?

Thanks a ton for the help I have already answered most of my other questions with your responses to other posts, very helpful site!

Thanks in advance,
Keith

 

[Dhadley]

Re: 92 Johnson 115 aux fuel pump problems

There should be nothing in the fuel line from the tank to the motor except a primer bulb and a water seperator.

 

[8lbCalico]

Re: 92 Johnson 115 aux fuel pump problems

I swear I just read in the manual that if the tank is so many inches below the fuel pump that there may be issues... I could be wrong, lord knows I have been before!

So in this case would you remove the aux fuel pump and simply put a coupler in? Or would you run a completely new line to the sep from the tank?

 

[Dhadley]

Re: 92 Johnson 115 aux fuel pump problems

If I were doing it I'd run a new line. A coupler is / can be a fuel restriction.