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Onan JC Stumper


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  #11  
Old 11-26-2016, 06:44:48 PM
captainjdog captainjdog is offline
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Default Re: JC Stumper

Looking into the regulators, my current propane path is follows:
Two 100 lb tanks > Red Fisher R622H-JGJ Regulator > ASCO Solenoid > Green Fisher R622-DFF Regulator > Carb.

I think it is malfunctioning, but if someone can verify. With the engine off and I activate the solenoid, I see fumes / hear hissing / smell propane going into the carb. From what I read it appears the regulator is supposed to receive vacuum from the engine before providing propane?

Same thing happens if I switch from electric start to hand crank.

The thought hadn't occurred to me that I might be receiving too much fuel.
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  #12  
Old 11-26-2016, 07:26:40 PM
len k len k is offline
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Default Re: JC Stumper

Not a magnaciter , but an electronic voltage regulator board. The 2 round cylinders at bottom of the reg board have the shape of capacitors, or maybe coiled inductors. But the coating over them looks like a factory rubber boot of some sort. Board looks potted in epoxy, make repair very difficult even if your an EE type tech and know how to repair to component level.
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  #13  
Old 11-26-2016, 08:19:36 PM
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BigBlockChev BigBlockChev is offline
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Default Re: JC Stumper

If you look at the pics you can see where the original Magneciter was mounted , also the 6 bolt bosses instead of the 4 used on YD gen ends. So if Onan produced some sort of replacement electronic regulator for the magneciter gen ends it would be interesting to get more information about it, specs etc. Cheers Dan
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  #14  
Old 11-26-2016, 08:41:23 PM
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Default Re: JC Stumper

That is a regulator from a Kubota powered unit. I would have to look up which one.
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  #15  
Old 11-26-2016, 09:26:58 PM
YellowLister YellowLister is offline
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Default Re: JC Stumper

Can't find much on your regulator except

http://generator-parts.com/onan-305-...auto-volt.html

Ouch!!
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  #16  
Old 11-26-2016, 10:30:12 PM
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Jim McIntyre Jim McIntyre is offline
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Default Re: JC Stumper

Quote:
Originally Posted by captainjdog View Post
...With the engine off and I activate the solenoid, I see fumes / hear hissing / smell propane going into the carb. From what I read it appears the regulator is supposed to receive vacuum from the engine before providing propane?
Correct. No fuel should be flowing until the vacuum in the carb venturi draws it in. Your Fisher 622-DFF needs to be followed by something like a Garretson KN:

https://carbturbo.com/product/garret...co-kn-039-122/

Pic below shows the specs on your Fisher 622-DFF. It is not a demand regulator.
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Last edited by Jim McIntyre; 11-26-2016 at 11:28:42 PM.
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  #17  
Old 11-26-2016, 10:51:47 PM
Ray Lynch Ray Lynch is offline
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Default Re: JC Stumper

Jim
Was your attachment supposed to show a demand regulator?
Ray
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  #18  
Old 11-26-2016, 11:26:51 PM
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Default Re: JC Stumper

No. The link is a demand regulator. The attachment is the regulator the OP has as his secondary, according to an earlier post...
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  #19  
Old 11-27-2016, 02:23:09 AM
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Default Re: JC Stumper

Thats an Onan static exciter/regulator assembly that replaced the old Magneciter guts.

Hold on to your seat.... The static unit alone listed in 2015 for $1063. The "kit" listed for $1345.

Powertronics, has a universal regulator (XR8) and a static exciter module (SEM250A) for a combined total of $733.

http://www.power-tronics.com/technic...intechpage.htm

Sending the attachment along as a little help and reference for what you have. Apologies for splitting it in half--was a little to large for allowed upload as a single document.
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File Type: pdf C439_Static_Ex-Reg-Conversion-Pt-II.pdf (199.8 KB, 16 views)
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  #20  
Old 11-27-2016, 07:19:17 AM
armandh armandh is offline
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Default Re: JC Stumper

back to the original problem


a loose or corroded connection, bad connector crimp, etc
this high resistance connection causes a voltage drop
thus no function in the down-stream circuits.

remove a major part of the down-stream circuit load
and other stuff starts working is a good clue
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