Fargo - Bad Onan Fuel Pump??

richard waters

New member
Feb 8, 1999
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> Just got back from my pilgrimage to the annual Pyrotechnics Guild
> International, Inc. (PGII) convention at Fargo, ND (this year). Went about
> 1000 miles total w/o a hitch on the coach itself. Love that new DigiPanel!
> What a slick device. Only got an average of 8 mpg :-(
>
> Only issue I had was with the Onan. Out of the blue it started to miss
> occasionally and got so bad it started to die... then catch itself then go
> through the same scenario again till I finally shut it off. Changed the
> plugs to AC 216 (crossed them and only had to goto three different parts
> stores to finally find anything that word fit). No help at all. Seems the
> hotter it gets the worse it gets. Checked the fuel filter and it appears
> fine. Checked and cleaned the points and they too looked fine. Did not check
> the output of the fuel pump but I will do that next. Oil was fine too after
> about 12 hours of operation this all started up. Starting to think it's a
> bad fuel pump, coil or condenser but will check out all the simple stuff
> first. Wished I'd have gotten the pointless ignition now that I read the
> manual says to change the points every 200 hours! Incase I need it does
> anyone have the three Onan P/N's of the pointless ignition?
>

Nate,
Happy that the trip to Fargo was relatively uneventful. On my coach for the
past year and 10,000 miles I average 8.6 MPG.

Your Onan problem sounds just like mine. My Onan was hard to start. I ended up
having to shoot starting fluid into it to get it to start sometimes. Once
started it would run for maybe 2-3 minutes and then start to die. It would
catch itself and run another 2-3 minutes. It turned out the problem was a bad
fuel pump. I did all the other stuff about cleaning the filter and making sure
the ignition was OK and it was. Nothing helped. I finally disconnected the
fuel line to the carb and tried to start to see if the pump would pump. It
would not. An earlier clue, which I ignored, that I had a bad pump was when I
couldn't hear it click anymore when I tried to prime it with the primer button I
installed.

You can get the fuel pump from Onan and expect to pay about $125. Or I guess
you can get it from other sources for less. I was in a hurry and didn't want to
spend time trying to get the pump from another cheaper source so I got it from
Onan.

I installed the electronic ignition yesterday and am pleased with it.
Richard Waters
 
> An earlier clue, which I ignored, that I had a bad pump was when I
>couldn't hear it click anymore when I tried to prime it with the
>primer button I
>installed.
>
>You can get the fuel pump from Onan and expect to pay about $125. Or I guess
>you can get it from other sources for less. I was in a hurry and
>didn't want to
>spend time trying to get the pump from another cheaper source so I got it from
>Onan.
>
>I installed the electronic ignition yesterday and am pleased with it.
>Richard Waters
>

I had much the same problem a few years ago and had Osbourns in
Albuquerque look at the pump. They cleaned it out and it then worked
fine. They told me that letting it sit for a long time without
starting it, especially in hot weather, will cause the fuel to gunk
it up and the piston in the pump will sometimes seize. Although I've
never had it apart myself, it can be cleaned out and this info might
save someone the expense of replacing it.

Another reason to be sure to start your Onan at least once a month
when the GMC is in storage and letting it run with a load on it until
it warms up sufficiently.

Emery Stora
77 Kingsley
Santa Fe, NM
 
>
> You can get the fuel pump from Onan and expect to pay about
> $125. Or I guess you can get it from other sources for
> less. I was in a hurry and didn't want to spend time trying
> to get the pump from another cheaper source so I got it from
> Onan.

FWIW, my father replaced his Onan fuel pump with one from AutoZone. Looks
like the same one I bought for an auxilliary pump for my coach.

Patrick
 
mr.c (me) was doing a group buy on the onan ignitions. I was asking
118$ for the ignition and $11 for the oil filter. I have to make one
more trip to get the last ignition to the last one on the list. If
you want, I can get you one at the same time, however, Onan raised
their prices to $121 for wholesale and $12 for the filter. If you
want them you can contact me and we can make arrangements for me to
get them for you.
al

> > about 12 hours of operation this all started up. Starting to think it's a
>> bad fuel pump, coil or condenser but will check out all the simple stuff
>> first. Wished I'd have gotten the pointless ignition now that I read the
>> manual says to change the points every 200 hours! Incase I need it does
> > anyone have the three Onan P/N's of the pointless ignition?
>>
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