Fuel pump

R

Rinker85

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I’m trying to replace a fuel pump on a 1988 60 hp 2 cycle 3 cylinder Mercury outboard.

The old pump number is 98766. I ordered a new one but it doesn’t fit. It has a knob on the back side that won’t let it seat properly. I’ve attached pictures of the old and new pump.
 

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roscoe

roscoe

Supreme Mariner
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21,752
Well, you have 3 options.
Take parts from the 2 pumps and make a good one.

Return that counterfeit pump and buy a real Mercury pump. Should be part number

14360A73 $125​


Or return the new one, and just rebuild the old one.

What is wrong with the original pump?
 
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R

Rinker85

Petty Officer 1st Class
Joined
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Messages
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roscoe said:
Well, you have 3 options.
Take parts from the 2 pumps and make a good one.

Return that counterfeit pump and buy a real Mercury pump. Should be part number

14360A73 $125​


Or return the new one, and just rebuild the old one.

What is wrong with the original pump?
Click to expand...
I can only start the motor with a shot of starting fluid. After that, I can start it all day long no problem. So I thought I’d start with the easy stuff the fuel pump and fuel filter.
 
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Rinker85

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Also, when I took the fuel pump apart, there was specs of varnish inside the pump if that’s what you call it. The diaphragm was not punctured or anything like that so I put everything back together with the old fuel pump and still have the same issue.
 
rolmops

rolmops

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Feb 24, 2002
Messages
5,518
It looks like you took a perfectly fine fuel pump apart. I do believe that you problem is in your carburetor. Or with the position of the fuel enrichener on your remote. Starter fluid is very unhealthy for two stroke engines, unless you mix a bit of oil in with it
 
roscoe

roscoe

Supreme Mariner
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Messages
21,752
You shouldn't need a great fuel pump to start the engine.
Pumping the primer bulb should fill the carb bowls with sufficient fuel.

An advanced throttle and a properly working enricher/choke should get it started
 
R

racerone

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38,421
Agreed----This may not be a fuel pump problem----Simple test.----Have your able assistant operate the manual fuel pump while doing a cold start.
 
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