wont pump fuel

[gusgus16]

Hello i have a 1967 outboard mercury 95ss inline six. it only stays running if i squeze the ball and keep it hard, so i thought it was the diaghram, so i replaced them. still have the problem and now im stuck

 

[CharlieB]

Re: wont pump fuel

You may have air being sucked into the fuel line between the bulb and the pump.

When you squeze the bulb you pressurize that section of line causing the O-rings in the fittings to seal, but once under a vacuum it leaks.

Test by replacing the hose from the fuel pump to carb with a clear hose, crank or start the motor and watch for bubbles in the fuel.

Remove the clear hose once you are finished with your repairs, it is not rated for marine use and can fail when you least expect it.

 

[gusgus16]

Re: wont pump fuel

hello again i have replaced everything in the fuel line still wont pump. when i squeze the ball it stays running, but when i stop it will run until fuel has drained out of the ball. i even replaced the ball in case it was a bad ball, any suggestions.

 

[Doernuth]

Re: wont pump fuel

Check the fuel tank if it is a portable it could be the problem....

 

[gusgus16]

Re: wont pump fuel

what do you mean portable

 

[CharlieB]

Re: wont pump fuel

Is this the in-line 6 with two fuel pumps?

When you replaced the diaphragms did you use the fuel pump rebuild kits that included the new check valves?

Generally when squeezing the primer bulb keeps the motor running the problem is either air sucking into the system after the bulb or bad fuel pump(s), like leaking check valves in the fuel pump.

Disconnect the fuel line after the fuel pump, install a clear hose, crank the motor and watch the fuel stream.

If either pump fails, get a complete pump rebuild kit(s).

 

[gusgus16]

Re: wont pump fuel

i got the fuel pump kit but it never came with new check valves but it came with the cork washers that go between them.

 

[CharlieB]

Re: wont pump fuel

Have your serial # ready then go here to see the fuel pump

http://www.mercruiserparts.com/selectSerailRange.asp?doc_nbr=115+(6+CYL.)

I would almost bet that the check valves in your pumps are leaking which will not allow the pumps to function.

 

[viperxp45]

Re: wont pump fuel

looking for a FUEL PUMP FOR A MERCURY 1976 85 HP ,, CANT SEEM TO FIND IT ANYWERE. belive the part number is 73434a 5 any help is appreceiated, my e mail is viperxp45@msn.com, thanks

 

[viperxp45]

Re: wont pump fuel

looking for a FUEL PUMP FOR A MERCURY 1976 85 HP ,, CANT SEEM TO FIND IT ANYWERE. belive the part number is 73434a 5 any help is appreceiated, my e mail is viperxp45@msn.com, thanks

Solved, i found one on ebay i just got realy lucku,, or i should say God Blessed me

ebay had the part i needed for 40 bucks. im ah fishing now