Yup, thought of that. Full of oil, and the fuel pump has a steady 12v when
cranking.
Took the pump off and ran it on the bench today, it skips and misses like an
old model T.
Thanks for the suggestion.
Mark
> -----Original Message-----
> From: owner-gmcmotorhome
> [mailto
wner-gmcmotorhome]On Behalf Of Tipton, Eric
> Sent: Monday, October 05, 1998 10:15 AM
> To: gmcmotorhome
> Subject: RE: GMC: Generator fuel system question (reply2)
>
>
> Check the oil level. There is an oil pressure switch on the fuel line
> to project the motor when the oil pressure is low. Also check the
> operation of this switch. Are the wires connected, etc. I am at the
> office, but the manual should have troubleshooting info. If you need me
> to look it up tonight, just send me an e-mail.
>
> Eric Tipton
> etipton
>
>
> -----Original Message-----
> From: Mark Grady [mailto:mgrady]
> Sent: Sunday, October 04, 1998 2:29 PM
> To: gmcmotorhome
> Subject: GMC: Generator fuel system question
> (reply2)
>
> Miek --
>
> Nope, dead... or at least trying to die.
>
> I originally thought low fuel might be the problem when
> it first occurred,
> having run out of fuel once before understanding the
> pretzel logic of the
> General's fuel system. The generator stopped running on
> our way home, and I
> was cutting it close on gas.
>
> I filled the tanks and the genset still wouldn't start.
> Here was my
> troubleshooting procedure:
>
> Slid out the power drawer, pulled the trigger wire off
> the starter solenoid.
>
> Took the pump to carb gas line off, put in into an empty
> gas can.
>
> Hit the genset mounted start switch. The fuel pump
> pulsed erratically, like
> it needed a pacemaker. No fuel delivered.
>
> Thought the filter in the pump (a Facet) might be
> plugged.
>
> Took off the bottom twist off, pulled out the barrel
> shaped filter. It was
> clean as a whistle. Put it all back together, discharge
> hose in the gas can,
> held the button to start.
>
> The pump pulsed for a few minutes, then stopped. Tapped
> it with a wrench, it
> would pulse a little, run for about 5 to 10 seconds,
> then stop again.
>
> I could repeat this run / failure cycle by tapping on
> the side of the pump
> itself. Duplicated the same condition from the control
> on the inside of the
> coach.
>
> I grew up on a farm, and this same style of pump was
> used by John Deere on
> their gas combines, and they would fail the same way. (I
> think they were
> made by Bendix though)
>
> They later had a smaller squarish style model that used
> an external mount
> transistor. I think I'll call my JD parts guy and see
> what his price is on
> Monday, since I imagine all the other parts folks are at
> the Marion rally.
>
> Even though I have multiple Onans at work, no one gets a
> deal on parts from
> these guys.
>
> Thanks for the thought. I found out the hard way that
> when the gas gauge
> reading for either tank on a GMC reads 1/4 or less,
> you're already walkin'
> if you're driving uphill.
>
> Mark
>
> -----Original Message-----
> From: owner-gmcmotorhome
> [mailtowner-gmcmotorhome]On Behalf Of
> homebase
> Sent: Sunday, October 04, 1998 12:43 PM
> To: gmcmotorhome
> Subject: Re: GMC: Generator fuel system question
>
> Are you just out of gas ?
>
> {snip}
>
cranking.
Took the pump off and ran it on the bench today, it skips and misses like an
old model T.
Thanks for the suggestion.
Mark
> -----Original Message-----
> From: owner-gmcmotorhome
> [mailto
wner-gmcmotorhome]On Behalf Of Tipton, Eric> Sent: Monday, October 05, 1998 10:15 AM
> To: gmcmotorhome
> Subject: RE: GMC: Generator fuel system question (reply2)
>
>
> Check the oil level. There is an oil pressure switch on the fuel line
> to project the motor when the oil pressure is low. Also check the
> operation of this switch. Are the wires connected, etc. I am at the
> office, but the manual should have troubleshooting info. If you need me
> to look it up tonight, just send me an e-mail.
>
> Eric Tipton
> etipton
>
>
> -----Original Message-----
> From: Mark Grady [mailto:mgrady]
> Sent: Sunday, October 04, 1998 2:29 PM
> To: gmcmotorhome
> Subject: GMC: Generator fuel system question
> (reply2)
>
> Miek --
>
> Nope, dead... or at least trying to die.
>
> I originally thought low fuel might be the problem when
> it first occurred,
> having run out of fuel once before understanding the
> pretzel logic of the
> General's fuel system. The generator stopped running on
> our way home, and I
> was cutting it close on gas.
>
> I filled the tanks and the genset still wouldn't start.
> Here was my
> troubleshooting procedure:
>
> Slid out the power drawer, pulled the trigger wire off
> the starter solenoid.
>
> Took the pump to carb gas line off, put in into an empty
> gas can.
>
> Hit the genset mounted start switch. The fuel pump
> pulsed erratically, like
> it needed a pacemaker. No fuel delivered.
>
> Thought the filter in the pump (a Facet) might be
> plugged.
>
> Took off the bottom twist off, pulled out the barrel
> shaped filter. It was
> clean as a whistle. Put it all back together, discharge
> hose in the gas can,
> held the button to start.
>
> The pump pulsed for a few minutes, then stopped. Tapped
> it with a wrench, it
> would pulse a little, run for about 5 to 10 seconds,
> then stop again.
>
> I could repeat this run / failure cycle by tapping on
> the side of the pump
> itself. Duplicated the same condition from the control
> on the inside of the
> coach.
>
> I grew up on a farm, and this same style of pump was
> used by John Deere on
> their gas combines, and they would fail the same way. (I
> think they were
> made by Bendix though)
>
> They later had a smaller squarish style model that used
> an external mount
> transistor. I think I'll call my JD parts guy and see
> what his price is on
> Monday, since I imagine all the other parts folks are at
> the Marion rally.
>
> Even though I have multiple Onans at work, no one gets a
> deal on parts from
> these guys.
>
> Thanks for the thought. I found out the hard way that
> when the gas gauge
> reading for either tank on a GMC reads 1/4 or less,
> you're already walkin'
> if you're driving uphill.
>
> Mark
>
> -----Original Message-----
> From: owner-gmcmotorhome
> [mailto
wner-gmcmotorhome]On Behalf Of> homebase
> Sent: Sunday, October 04, 1998 12:43 PM
> To: gmcmotorhome
> Subject: Re: GMC: Generator fuel system question
>
> Are you just out of gas ?
>
> {snip}
>
