[AT] OT - JD STX38 fuel problems

Clint D driggars at earthlink.net
Mon May 24 10:26:23 PDT 2004


I have also noticed on my see thru filters that when the tractor is not
running they will be full but while running there will only be a small
amount visable in th efilter but no problems running

Clint


----- Original Message -----
From: "Bruce Fallon" <generalsubscribers at lists.antique-tractor.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Monday, May 24, 2004 10:35 AM
Subject: Re: [AT] OT - JD STX38 fuel problems


> I have these visible filters on most of my rigs including 3 JD 110 and 112
> mowers sometimes they are full and sometimes you don't see hardly any fuel
> in them., but they run just fine. I pick them up at the Hardware Store.
>
> Bruce Fallon
> Freeland WA. 98249
> generalsubscribers at lists.antique-tractor.com
> ----- Original Message -----
> From: "Dean VP" <deanvp at att.net>
> To: "'Antique tractor email discussion group'"
> <at at lists.antique-tractor.com>
> Sent: Monday, May 24, 2004 12:45 AM
> Subject: RE: [AT] OT - JD STX38 fuel problems
>
>
> Mike:
>
> Let's think about this a minute. How big is the inside of the filter that
> you can see through the window? The fuel usage on a STX38 isn't all that
> high even while mowing. I'm just not sure the window is a good indicator
of
> anything being incorrect. The required flow isn't that high. How long does
> it take to empty the tank while mowing? A long time. There may be enough
gas
> flowing in the filter that you can't see it all through the window.
>
> Why it isn't full all the time is a question worth pursuing but all I can
> think of is there must be some back pressure but I don't know where it is
> coming from. Is it possible the filter is quite high in comparison to the
> level of the fuel in the tank? I think we need to know what the innards of
> the filter are in order to really decide that it not being full all the
time
> is really a problem.
>
> As far as it now running w/o ever cutting out can be due to many things.
> Maybe there was a partial blockage somewhere in the system that is now
> cleaned out. Maybe it has something to do with going up or down hills or
> being on a side hill. Or what the level of the fuel is in the tank when
you
> do that. I think what I would do is run the sucker until the problem
> returns. Right now I think we are chasing ghosts.
>
> Dean A. Van Peursem
> Snohomish, WA 98290
>
> What people can dream, people can do! George W. Bush
>
> www.deerelegacy.com
>
> http://members.cox.net/classicweb/email.htm
>
>
>
>
> -----Original Message-----
> From: at-bounces at lists.antique-tractor.com
> [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Mike S
Meulenberg
> Sent: Sunday, May 23, 2004 4:51 PM
> To: at at lists.antique-tractor.com
> Subject: Re: [AT] OT - JD STX38 fuel problems
>
> Saturday, I pulled the carb and went through the whole thing to make sure
> nothing was plugged. Before I pulled it off, I removed the bottom bowl to
> reveal the float. I manually moved the float up and down and had good
> flow inside the bowl. I noted that there were no scrape marks, and the
> float isn't adjustable. I put everything back together, and then mowed
> the lawn. It ran the entire time with the filter empty, but never quit. I
> wasn't able to get a JD filter because the dealer was closed. I think
> I'll slap one of those on and then take Larry's advise:
> "When I'm working on a customer's machine, I simply run the
> engine with hood closed and with all the side panels in place until
> everything is up to ordinary operating temperature.  If the engine
> doesn't falter, I ship it back to the owner regardless of whether the
> fuel filter fills while it's running."
>
> Thanks for all the help, it's appreciated.
>
> Mike
>
>
>
>
>
>
>
>
> On Tue, 18 May 2004 21:28:14 -0700 "Dean VP" <deanvp at att.net> writes:
> > Mike:
> >
> > Another thought. Is it possible that the float is hanging up in the
> > bowl
> > because it has been bent accidentally to one side? Or the needle
> > getting
> > stuck in the seat occasionally? Or the float isn't set quite right
> > to allow
> > enough needle travel? Maybe due to heat?
> >
> > Can you get to the hose that runs from the in-line filter to the
> > carburetor?
> > If you take this connection loose at the carburetor is the flow
> > always good?
> >
> >
> > This is the demarcation line. If the flow isn't good at the end of
> > the hose
> > that connects to the carburetor then the problem is further back
> > towards the
> > in-line filter and/or tank or lines. If the flow is good, then the
> > problem
> > is in the carburetor. The parts list doesn't show how the hose
> > connects to
> > the carburetor, but maybe there is some crud at the inlet point,
> > maybe a
> > partially plugged screen or sticking float or needle valve. All it
> > would
> > take is a small piece of crud at the needle and seat to cause the
> > symptoms
> > you are experiencing.
> >
> > I keep thinking of a vapor lock but I've not seen that when one has
> > rubber
> > hoses feeding the gas.
> >
> > Since you don't have the solenoid that shuts off the gas and you are
> > not
> > losing fuel into the carburetor when the tractor is parked, then the
> > needle
> > must always be shutting off the fuel flow properly. That kind of
> > precludes
> > the possibility of some crud at the needle to seat interface and it
> > would
> > flood occasionally too. Unless you are always shutting off the fuel
> > valve
> > after each usage.
> >
> > To me checking the hose inlet to the carburetor will lead you to the
> > problem.
> >
> > Dean A. Van Peursem
> > Snohomish, WA 98290
> >
> > What people can dream, people can do! George W. Bush
> >
> > www.deerelegacy.com
> >
> > http://members.cox.net/classicweb/email.htm
> >
> >
> >
> >
> > -----Original Message-----
> > From: at-bounces at lists.antique-tractor.com
> > [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Dean VP
> > Sent: Tuesday, May 18, 2004 9:58 AM
> > To: 'Antique tractor email discussion group'
> > Subject: RE: [AT] OT - JD STX38 fuel problems
> >
> > Vaughn:
> >
> > Seems to me it has everything to do with fuel flow if it is not
> > working
> > properly. If the wiring is intermittent or the coil in the solenoid
> > has some
> > windings that short out it may not be opening properly or staying
> > open
> > properly during run time. It appears to be opened by turning on the
> > switch
> > and is supposed to stay open until the switch is turned off. If it
> > isn't
> > opening properly or is intermittent it would explain the symptoms
> > present.
> > It may start acting up only after running for awhile as it heats up.
> >
> >
> > Dean A. Van Peursem
> > Snohomish, WA 98290
> >
> > What people can dream, people can do! George W. Bush
> >
> > www.deerelegacy.com
> >
> > http://members.cox.net/classicweb/email.htm
> >
> >
> >
> >
> > -----Original Message-----
> > From: at-bounces at lists.antique-tractor.com
> > [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Vaughn
> > Miller
> > Sent: Tuesday, May 18, 2004 4:50 AM
> > To: at at lists.antique-tractor.com
> > Subject: RE: [AT] OT - JD STX38 fuel problems
> >
> > The solenoid at the Carburetor bowl shuts off fuel to the main jet
> > to
> > prevent backfire, and will have nothing to do with the flow into the
> > carburetor.
> >
> > Vaughn
> >
> > >>> deanvp at att.net 5/18/04 1:21:01 AM >>>
> > <snip>
> > 4.) What does the solenoid do in the carburetor bowl? Does this just
> > let
> > fuel flow when the switch is on? Doesn't look like a pump. Is this
> > solenoid
> > acting up? Wiring loose or corroded? This may be where the problem
> > is. Is
> > the carburetor bowl clean inside?
> > _______________________________________________
> > AT mailing list
> > http://www.antique-tractor.com/mailman/listinfo/at
> >
> >
> >
> > _______________________________________________
> > AT mailing list
> > http://www.antique-tractor.com/mailman/listinfo/at
> >
> >
> >
> > _______________________________________________
> > AT mailing list
> > http://www.antique-tractor.com/mailman/listinfo/at
> >
> >
> _______________________________________________
> AT mailing list
> http://www.antique-tractor.com/mailman/listinfo/at
>
>
>
> _______________________________________________
> AT mailing list
> http://www.antique-tractor.com/mailman/listinfo/at
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.690 / Virus Database: 451 - Release Date: 5/22/2004
>
> _______________________________________________
> AT mailing list
> http://www.antique-tractor.com/mailman/listinfo/at

_______________________________________________
AT mailing list
http://www.antique-tractor.com/mailman/listinfo/at




More information about the AT mailing list