Welcome to a vacume operated accelerator pump.!!!
What are the two times when the vacume drops?
When you step on the gas and you need a squirt.
The other is when you shut the engine off and all vacume dies
Steve
----- Original Message -----
From: Brandon Kunicki <c322348@yahoo.com>
To: Military Vehicles Mailing List <mil-veh@mil-veh.org>
Sent: Tuesday, October 03, 2000 2:34 PM
Subject: Re: [MV] M151A2 Carburetor Problem
> Are you sure that the bleed line from the carburetor
> inlet is hooked up (and not plugged or missing)?
>
> There is an orifice inside through which fuel is
> vented back to the fuel tank. This vent line bleeds
> fuel back to the tank so that the excess fuel flow can
> carry heat away to prevent vapor lock.
>
> If this line is missing or plugged, your M151 will
> have fuel pressure to the carb even with the engine
> off. Fuel pressure should bleed immediately upon
> engine shutdown through the bleed line back into the
> tank. Without this bleed system functioning, you will
> also have excessive fuel pressure to the carburetor.
> Oh, did I mention you could get vapor lock as well?
>
> The fuel supply line comes from the right side of the
> vehicle and across the front of the engine, into the
> filter, than into the carburetor. Immediately adjacent
> to this area, another line (the bleed line) travels
> from the carburetor towards the firewall.
>
> Another sad story......the M151 carburetor filter
> stinks! My M151 would run for 5 minutes, then die
> unexpectedly. After sitting for a while it would start
> and run fine for another 5 minutes....
>
> The fuel filter was clogged with particles which would
> block the flow while running. After the pressure would
> bleed down (through the dirt), the dirt would fall off
> the filter internally and open up a passage again. All
> would be well until the fuel flow caused the particles
> to clog the filter again. I replaced the filter with a
> new one twice with the same results. I drained the
> (bad) fuel out of the tank and put a higher capacity
> filter in the line that was made from clear plastic so
> I could tell when it was dirty.
>
> End of problem!
>
> Brandon
>
> --------------------------------------
> > I have noticed that my late model Zenith Carburetor
> > squirts fuel every time
> > I turn the engine off and does the same when I
> > start. All this happens
> > without my touching the accelerator - is this normal
> > behavior? If so, is
> > there a way to adjust the amount of fuel the
> > carburetor automatically
> > squirts? This "extra" fuel is causing problems when
> > I am trying to start
> > the vehicle when it is hot.
>
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Photos - 35mm Quality Prints, Now Get 15 Free!
> http://photos.yahoo.com/
>
> ===Mil-Veh is a member-supported mailing list===
> To unsubscribe, send e-mail to: <mil-veh-off@mil-veh.org>
> To switch to the DIGEST mode, send e-mail to <mil-veh-digest@mil-veh.org>
> To reach a human, contact <ack@mil-veh.org>
This archive was generated by hypermail 2b29 : Wed Nov 01 2000 - 21:37:36 PST