1996 90hp Fuel Pump Test and Rebuild

[Scode68]

I have to test the pressure but its raining buckets outside now. I have a fuel pump on my 1996 90hp Johnson (J90TLEDA) and it might need to be rebuilt. I see Part number 5007420 listed as a kit but I think it?s the pump assembly along with some other things.

It?s $398.

Is there a cheaper kit that just has the internals so I can rebuild the pump myself?

 

[tashasdaddy]

Re: 1996 90hp Fuel Pump Rebuild

Re: 1996 90hp Fuel Pump Rebuild

they are not rebuildable, they are replacement, or go the premix pump.

 

[Scode68]

Re: 1996 90hp Fuel Pump Test and Rebuild

Where do I hook up the fuel pressure gage and what should the pressure be? I would think after the pump but doesn't it work on the vacuum or pulse of the pistons?

What I have is more of a vacuum gage and I would think I have to hook it up before the pump. Do I need an actual pressure gage so I can hook it up after the pump?

 

[ezeke]

Re: 1996 90hp Fuel Pump Test and Rebuild

The pulse fitting test is just the first test in the line. The connection is to the fuel pump, not the engine: http://www.maxrules.com/graphics/VROpics/VROflowchart.jpg

The test procedure, diagrams, instructions, etc are on line at Bill Kelly's site if you don't have a service manual.

Go here and scroll to the word ALL in red, then pick the graphic that you need: http://www.maxrules.com/fixomcvro.html

 

[Scode68]

Re: 1996 90hp Fuel Pump Test and Rebuild

Do I need the special tester or can I get by with typical automotive tools? I have a compressor and a vacuum pump with a gage.

 

[Scode68]

Re: 1996 90hp Fuel Pump Test and Rebuild

I have a Johnson authorized mechanic in the area but I would hate to pay $80 an hour just to find out if the pump is what is giving me the trouble if I can do it myself.

 

[Scode68]

Re: 1996 90hp Fuel Pump Test and Rebuild

Can this be tested without special OMC tools?

 

[Scode68]

Re: 1996 90hp Fuel Pump Test and Rebuild

Can I doo this with regular tools or do I need the special OMC tools?