Date parsed: 6/7/2007 3:32:53 PM
Date: Thu, 07 Jun 2007 16:32:53 -0700
On Jun 7, 6:01 pm, Art <Arte...@spamtrap.invalid> wrote:
> Rick wrote:
> > We have an 18 hp.twinfuelpump on the side of the carb . It was
> > working fine and then quit . It appeared that it was lack of gas as it
> > would start and run as long as you pored the gas in the carb . I
> > rebuilt thefuelpump and it still wasn't gettingfuel. I took the
> > top off the carb and it was bone dry . I replaced the needle valve and
> > it still didn't getfuel. This time when the carb was apart I pored
> > some gas in the bowl and pored gas to thefuel pump line doing it
> > several times and turning it over to prime the pump . When I put the
> > carb back together it started right up and ran good . I took it out to
> > try mowing with it an again after about 10 minutes it acted like it
> > was starving for gas . Then it stalled again . Sameproblem. Thefuel
> > pump seems to be powered by a vacum hose coming up from the
> > crankcase . Is there anything in the crankcase (filter)or something
> > that would plug up ? I can feel som air coming out of the hose when I
> > turn it over . I can suckfuelout of the gas line at thefuelpump
> > connection from the tank...Any ideas...Rick
>
> That pump works off of alternating pressure and vacuum from the
> crankcase. They do not develop much pressure at all. I've never seen a
> pulse line get plugged. When you rebuilt thefuelpump did you clean
> every speck of the old gaskets off? I usually run a flat file over the
> pump body and cover lightly several times to make sure it is clean and
> flat. The thin rubber diaphragm goes against the body, then the gasket,
> then the cover.
> Check the pickup in the bottom of the tank, many have screens, and clean
> as needed. If there is an in-linefuelfilter replace it with one from a
> small engine shop. Do not use an automotive or paper typefuelfilter.
> That pump will not develop enough pressure to get thefuelthrough it.
> Also check thefuelline. If it is cracking at the ends or is soft and
> squishy, replace it. Also check that thefuelcap is vented.
>
> You are on the right track. Good luck.
>
> --
> Art- Hide quoted text -
>
> - Show quoted text -
Thaks for the info, The filter came from Laser Sales (a small engine
supply ) It is clear plastic and the filter media inside looks like a
GM filter (the small ones that go in the carb . I can suck gas through
the line right from the connection at the fuel pump . I light sanded
the surfaces to make sure I had everything . I wasn't aware there was
a pickup screen in the tank . I will check on it . I certainly acts
like the fuel is being restricted . Rick
