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Onan generator Parts Catalog


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Old 09-15-2017, 12:47:28 PM
JohnnyJeeper JohnnyJeeper is offline
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Default Onan generator Parts Catalog

Hello All,
First things first...
Onan Generator Model: 4.0bf3cr16000b
I am looking for a parts catalog or cross reference parts catalog,
This gen is in a 1978 Sportscoach...Same symptoms as many others,
Gen will only run while start switch is held, checked the fuel pump it wasn't pumping, did the old lightly tap pump with pliers and it would run but still only if I kept the start button pushed...replaced the pump but still will not run on its own, after reading some threads on this site I have narrowed it down to either the R1 resistor or oil pressure sensor, I do have a couple questions on this...
1) what would make the old and new fuel pump work intermittently and kicks in if tapped on?
2) where is the oil sensor located on this old model?
Thanks, J
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Old 09-15-2017, 02:24:07 PM
KPack KPack is offline
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Default Re: Onan generator Parts Catalog

https://www.dropbox.com/s/0pukam96ks...02bfp.pdf?dl=0
Here you go. 965-0220
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Old 09-15-2017, 03:34:57 PM
JohnnyJeeper JohnnyJeeper is offline
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Default Re: Onan generator Parts Catalog

Perfect!!!! Thanks!
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Old 09-15-2017, 04:48:52 PM
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Billy J Shafer Billy J Shafer is online now
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Default Re: Onan generator Parts Catalog

Is this in a GMC sportscoach.
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Old 09-15-2017, 05:10:31 PM
JohnnyJeeper JohnnyJeeper is offline
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Default Re: Onan generator Parts Catalog

No, its the Dodge chassis...440v8
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Old 09-15-2017, 06:25:28 PM
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Default Re: Onan generator Parts Catalog

Ok I forgot about that one. The GMC sportscoach Uses this BF a complete different system. That gets people confused.
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Old 09-15-2017, 06:46:10 PM
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Default Re: Onan generator Parts Catalog

The GMC had the one with the drawer? that would make things easier to get to. Would you know why the fuel pump would act that way? like I said in my original post I have come to the conclusion that it has to be either the oil pressure switch or the R1 resistor...but why would tapping on the fuel pump make any difference? it still wont run on its own when I tap on it but it sounds like it isn't getting gas, then I tap it and it starts but not run on its own...any insight on this would be great.
Thanks, J
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