[AT] OT - JD STX38 fuel problems
Mike S Meulenberg
msm10301 at juno.com
Thu May 20 17:59:36 PDT 2004
I did Dean, and with the line removed from the carb, fuel runs through
the filter like a garden hose. Something changes when it's hooked to the
carb however. The filter that is on, may be too restrictive for a gravity
system once the line is hooked to the carb. it doesn't make sense to me,
but you never know. For under $3 I'll certainly try the OEM filter.
Thanks,
Mike
On Thu, 20 May 2004 17:19:14 -0700 "Dean VP" <deanvp at att.net> writes:
> Mike:
>
> Have you performed the tests I suggested to isolate the gas flow
> problem to
> be on the filter side or the carburetor side? It's a simple test
> that would
> lead you to the specific problem w/o doing anything else. After
> reading some
> of the additional posts I would now guess the problem is the NAPA
> filter.
> With what little a JD OEM gas filter costs, I would replace the NAPA
> filter
> with a new OEM JD gas filter - AM107314 - $2.35 at your JD Dealer.
> Worst
> case it doesn't solve the problem but that will help isolate the
> REAL
> problem. Having a spare fuel filter handy is a good thing anyway
>
> 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: Thursday, May 20, 2004 4:39 PM
> To: at at lists.antique-tractor.com
> Subject: Re: [AT] OT - JD STX38 fuel problems
>
> Larry,
> I just looked at the owners manual too see if there may be a picture
> of
> the original filter. I did find one, and it does appear to be a lot
> smaller in length and diameter. While were on the OT subject, I was
> wondering if anyone would know why this mower won't haul my butt up
> a
> small hill in our yard in 5th gear, it just stops. I assume that the
> drive belt needs adjustment, because it looks OK. If there is no
> adjustment, then I can assume it's stretched. Anybody know of an
> adjustment.
>
> Thanks,
> Mike
>
> On Thu, 20 May 2004 17:39:16 -0500 "Larry D. Goss"
> <rlgoss at evansville.net> writes:
> > Naw, they're paper elements too, Mike. I've got a half dozen of
> > them
> > out in the shop. But, not all filter paper is created equal.
> >
> > Larry
> >
> > -----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: Thursday, May 20, 2004 5:09 PM
> > To: at at lists.antique-tractor.com
> > Subject: Re: [AT] OT - JD STX38 fuel problems
> >
> > I can try an OEM filter, but I bet it comes off the same line as
> my
> > NAPA
> > filter. I'm curious if the original filter was more of a screen
> > versus a
> > paper element. Phil, I tried vertical and horizontal, no change.
> > I'll
> > keep monkeying with it. Thanks everyone for all the help
> > Regards,
> > Mike
> >
> > On Thu, 20 May 2004 09:48:08 -0500 "Larry D. Goss"
> > <rlgoss at evansville.net> writes:
> > > What you've described here sounds like a typical vapor pressure
> > > problem,
> > > Mike. Greg's suggestion about a different brand of fuel filter
> > may
> > > solve it. Changing blends or octane ratings of gasoline may
> have
> >
> > > the
> > > same effect. I've never been able to predictably determine when
>
> > > the
> > > fuel supply system is going to react the way you are describing
> > it.
> > > When I replace the fuel filter on John Deere equipment, I always
>
> > use
> > > the
> > > OEM parts, but sometimes the filter fills and other times it
> > > doesn't.
> > > The running condition can change simply because of changes in
> the
> > > weather. 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.
> > >
> > > Remember the good old days of vapor lock?
> > >
> > > Larry
> > >
> > > -----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: Wednesday, May 19, 2004 10:42 PM
> > > To: at at lists.antique-tractor.com
> > > Subject: Re: [AT] OT - JD STX38 fuel problems
> > >
> > > I mowed again tonight, and here's what I observed:
> > > 1. When I last left the mower the filter was empty and the
> shutoff
> >
> > > was
> > > open, when I looked tonight
> > > the filter was full.
> > > 2. After mowing for a while the filter was empty, but it didn't
> > > quit.
> > > 3. About 3 hours after mowing the filter was again full.
> > >
> > >
> > > I'm beginning to wonder if the fuel filter is providing too
> much
> > > resistance to flow for a little mower without a fuel pump. Maybe
>
> > > the
> > > paper cartridge is too restrictive. I will check the carb again
> to
> >
> > > look
> > > for any signs of the float sticking.
> > >
> > > Thanks,
> > > 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
> > >
> > >
> > _______________________________________________
> > 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
More information about the AT
mailing list