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Need help with Onan 12.5 JC electric choke


I had to replace the LP carb on my 12.5 JC generator because of a broken mounting flange. I...

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Old 10-29-2011, 09:22 PM
sabre85rdj sabre85rdj is offline
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Default Need help with Onan 12.5 JC electric choke

I had to replace the LP carb on my 12.5 JC generator because of a broken mounting flange. I replaced it with a LP and gas dual fuel carb but I'm having some trouble getting the choke to work properly. I've connected the power lead to the hot side of the ignition coil so it's entergized when the unit is running. There are a number of terminals on the coil assembly and I'm not sure how to hook it up so the coils and choke heater are working properly. Does anyone have a picture or diagram how it should be hooked up? I don't meausure any continuity in the coils or heater so I'm not sure if they are any good. Does anyone have a set of coils or choke heater element that I can purchase? I need to get this figured out before winter sets in. I plan to keep running it on LP fuel so I don't really need the choke to work but the unit can't be run with the choke partially closed. I guess I could take the choke plate out but I'd like to get it working if at all possible.

I'd appreciate any advice or help anyone can offer.
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Old 10-29-2011, 09:32 PM
Richard L Richard L is offline
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Default Re: Need help with 12.5 JC electric choke

You do not use a choke with LP, so wire it open or remove it and plug the shaft holes.
Re
Rick
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Old 10-31-2011, 06:23 AM
gtj811 gtj811 is offline
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Default Re: Need help with 12.5 JC electric choke

Reading your post as I have a 5BGA with electric choke that does not work. Removed the choke and I see that the heater element wire is melted in one section. Anyone know what material I can use to replace the heater element wire and not try and find a whole new choke? Gregg
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Old 10-31-2011, 06:33 AM
IBEZKUM IBEZKUM is offline
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Default Re: Need help with 12.5 JC electric choke

My ONAN AJ had a broken heating element, In the electric choke and I just stretched it out, maybe not the right thing to do but it seems to work now. Im thinkin of going to a junk yard and getting a choke just for the element but my unit is 24volt, Not sure if it will work?
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Old 11-01-2011, 07:03 AM
DaGr51 DaGr51 is offline
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Default Re: Need help with 12.5 JC electric choke

I noticed a heating element coil on flea-bay a couple of days ago. Maybe give that a whirl.
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Old 11-03-2011, 06:18 AM
gtj811 gtj811 is offline
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Default Re: Need help with Onan 12.5 JC electric choke

Is there a part number or what is it called or listed under? Could not find the item for sale.
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Old 11-03-2011, 06:30 AM
DaGr51 DaGr51 is offline
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Default Re: Need help with Onan 12.5 JC electric choke

Search under "Onan Choke" or similar. You will need the part number. Like this http://ebay.com/itm/Onan-Generator-Choke-Element-153-0554-/320655976680 Or try OnanParts.com. Great people, great service.
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Old 11-03-2011, 08:05 AM
Max Thompson Max Thompson is offline
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Default Re: Need help with Onan 12.5 JC electric choke

Quote:
Originally Posted by gtj811 View Post
Is there a part number or what is it called or listed under? Could not find the item for sale.
It looks like the element & spring are one part # 153-0400 Spec. A-R
#153-0422 begin spec. S, "note, apec A -R also order 153-0425 spring for these engins"
For the price of an e-mail address, one of us will send you the JB-JC parts manual #967-0254
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Old 11-03-2011, 09:59 PM
pegasuspinto pegasuspinto is offline
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Default Re: Need help with Onan 12.5 JC electric choke

Many onan chokes are not 6 or 12 or 24 volt. but feed from the cranking winding directly at 30-40 volts or more.

Robert
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