How much cranking should a fuel pump need after a carb overhaul?

[btravlin2]

Howdy.......I've been having idle/low speed problems with my 318: sputtering, stalling, missing, acting fuel-starved. So I rebuilt the carb. No change. I put it back on and after some cranking it fired up and idled smoothly for about 10 seconds. Then I couldn't keep it running.

I torn it down again to double check it, and when I put it back on I also installed a transparent inline fuel filter as a second filter after the new fuel/water separator. I started cranking 5 seconds at a time. This went on for about a dozen tries. No fuel was entering the inline filter. I switched tanks, with no change. I took the fuel/water separator off and there was only a little bit of fuel in it. I can't imagine a fuel pump (mechanical) requiring that much time to do so little.

So I ordered another pump, as the only thing that made sense was the pump had failed. It was old anyway.

Am I correct that a good fuel pump should have gotten fuel to the carb fairly quickly? This is a 22' boat and the tanks are close to the motor.

 

[Another retired guy]

Re: How much cranking should a fuel pump need after a carb overhaul?

It may be the fuel pump, but also may be a problem with the new filters you installed or perhaps the fuel line got blocked during installation. Recheck all your work.

 

[Oshkosh1]

Re: How much cranking should a fuel pump need after a carb overhaul?

Did you install the new filter with the correct size inlet/outlet barbs for your fuel line?

Fill the F/W cartridge with gas prior to installing it...acts as a priming of sorts.

Squirt some fuel into the carb and try to get it running a little at a time to "prime" it. I used an old BBQ sauce bottle with gas in it. I had to fire it a couple of times before it stayed running.