Onan start problem

[steve southworth]

Onan will crank but not start unless the prime switch is pressed. I'm working through the trouble shooting and the only thing I'm confused about is
the K1-I contact. The K1 relay only has 4 terminals. Two for the coil and two for the main contact. So what/where is the K1-I contact?

Not having this contact available is not a problem as there is a work around.
--
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI

 

[charles boyd]

Sir, I had one that would only start and run if you held the prime button till the K1 would kick in then it would stay running. The initial start
circuit to pump and points comes off the starter solenoid and activates when starter is in action. The starter solenoid has a small terminal that
powers the board while activated and can go bad internally. You can add a jumper wire from the small terminal to the large terminal going to the
starter externally. As long as the small terminal is 12v when cranking all is good.

> Onan will crank but not start unless the prime switch is pressed. I'm working through the trouble shooting and the only thing I'm confused about
> is the K1-I contact. The K1 relay only has 4 terminals. Two for the coil and two for the main contact. So what/where is the K1-I contact?
>
> Not having this contact available is not a problem as there is a work around.

--
C. Boyd
76 Crestmont
East Tennessee

 

[johnny]

If once it runs you can release the prime button, What Chuck Said. I see sets with paint on that trerminal and the circuit board 10 wires to the big
terminal on K1. If it doesn't stay running, try the ol' 5 - 9 jumpp. If it then runs, likely K3 is dying. It's marginal to pull in initially at
best. I replace K3 with a pair of small cube relays. I wire the small one which only has 1 amp contacts in the coil ircuit, and let
it turn the marge one on using fused 5 amps off the card. They have to be glued together and onto the circuit board.

--johnnty

--
76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased

 

[Gene Fisher]

Read here

http://gmc49ers.blogspot.com/2016/04/onan-start-relay-k1.html

On Fri, Jul 27, 2018 at 6:59 PM Charles Boyd
wrote:

> Sir, I had one that would only start and run if you held the prime button
> till the K1 would kick in then it would stay running. The initial start
> circuit to pump and points comes off the starter solenoid and activates
> when starter is in action. The starter solenoid has a small terminal that
> powers the board while activated and can go bad internally. You can add a
> jumper wire from the small terminal to the large terminal going to the
> starter externally. As long as the small terminal is 12v when cranking
> all is good.
>
>
>
>

> > Onan will crank but not start unless the prime switch is pressed. I'm
> working through the trouble shooting and the only thing I'm confused about
> > is the K1-I contact. The K1 relay only has 4 terminals. Two for the
> coil and two for the main contact. So what/where is the K1-I contact?
> >
> > Not having this contact available is not a problem as there is a work
> around.
>
>
> --
> C. Boyd
> 76 Crestmont
> East Tennessee
>
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--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://bdub.net/gmcmotorhome.info/
Alternator Protection Cable
http://bdub.net/gmcmotorhome.info/APC.html

 

[johnny]

I see these now and again with the wire removed from the right hand small terminal and connected to the right large terminal. It sort of will work
there if everything is up to snuff, and in that configuration you can use a Ford Truck starter solenoid. Sort of. Many places have the correct Onan
Starter Relay for sale, google it.

--johnny
--
76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased

 

[Gene Fisher]

That is not correct

Off the right to the left terminal
Read here
http://gmc49ers.blogspot.com/2016/04/onan-start-relay-k1.html

On Thu, Aug 2, 2018 at 12:59 PM Johnny Bridges via Gmclist <

> I see these now and again with the wire removed from the right hand small
> terminal and connected to the right large terminal. It sort of will work
> there if everything is up to snuff, and in that configuration you can use
> a Ford Truck starter solenoid. Sort of. Many places have the correct Onan
> Starter Relay for sale, google it.
>
> --johnny
> --
> 76 26' Eleganza(?) with beaucoup mods and add - ons.
> Braselton, Ga.
> "I forgive them all, save those who hurt the dogs. They must answer to me
> in hell" - ol Andy, paraphrased
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://bdub.net/gmcmotorhome.info/
Alternator Protection Cable
http://bdub.net/gmcmotorhome.info/APC.html