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Onan JB Thermomagnetic Choke


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  #11  
Old 08-14-2017, 09:08:07 PM
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Default Re: Onan JB thermomagnetic choke

Be real careful with the choke mechanism because the parts are hard to find and when found, expensive.
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  #12  
Old 08-14-2017, 10:01:56 PM
Leon N. Leon N. is offline
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Default Re: Onan JB thermomagnetic choke

Hello JoeE!

Don't believe Kpack. He must have been drinking something?

BTW! Make sure you comply with the generator output leads grounding scheme as printed on the inside of your control box cover. You have a gem here the likes of which will,never be built again. If taken care of it will outlast you.

A question please. Is your JB strictly gasoline-only or does it have a tri-fuel,carburetor?

WRT no oil pressure switch. Is there a pipe plug where the switch would go? If so, you could add one but you would have to add additional components inside the control box. A related question: Is there a hole probably covered with a plug on the right side of the front panel just below where the hand-crank toggle switch would be?

Do not try to start this puppy until you make sure that the generator lead T-2 is tied to the chassis per wiring diagram printed on the inside of the control box cover.

How about some pictures. Also, temporarily remove the generator end bell cover (two bolts)
and take a picture for us or at least indicate the condition of the Magneciter coils. Thanks!
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Old 08-15-2017, 02:38:28 AM
KPack KPack is offline
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Default Re: Onan JB thermomagnetic choke

Quote:
Originally Posted by Leon N. View Post
Hello JoeE!

Don't believe Kpack. He must have been drinking something?

BTW! Make sure you comply with the generator output leads grounding scheme as printed on the inside of your control box cover. You have a gem here the likes of which will,never be built again. If taken care of it will outlast you.

A question please. Is your JB strictly gasoline-only or does it have a tri-fuel,carburetor?

WRT no oil pressure switch. Is there a pipe plug where the switch would go? If so, you could add one but you would have to add additional components inside the control box. A related question: Is there a hole probably covered with a plug on the right side of the front panel just below where the hand-crank toggle switch would be?

Do not try to start this puppy until you make sure that the generator lead T-2 is tied to the chassis per wiring diagram printed on the inside of the control box cover.

How about some pictures. Also, temporarily remove the generator end bell cover (two bolts)
and take a picture for us or at least indicate the condition of the Magneciter coils. Thanks!
I thought you had to be a subscriber to edit your post.
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  #14  
Old 08-15-2017, 09:09:19 AM
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Default Re: Onan JB thermomagnetic choke

Kpak is the new salesman for the site. You know how salesman are.

I think you just have to post a few times to edit.

Got your message Kpak. Where is the rain they promised.
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Old 08-15-2017, 09:32:02 AM
Wayne 440 Wayne 440 is offline
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Default Re: Onan JB thermomagnetic choke

Quote:
Originally Posted by KPack View Post
I thought you had to be a subscriber to edit your post.
As far as I know, you are correct.
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Old 08-15-2017, 10:58:46 AM
Jim Marcozzi Jim Marcozzi is offline
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Default Re: Onan JB thermomagnetic choke

What exactly does the coil do on these chokes? Most chokes I've seen just have the heater coil.
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Old 08-15-2017, 01:04:52 PM
len k len k is offline
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Default Re: Onan JB thermomagnetic choke

I think it closes the choke butterfly while cranking. Basically makes more vacuum behind choke butterfly so more gasoline gets sucked up dip tube from carb bowl. Making the air/fuel mix richer. Unusual design.
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Old 08-17-2017, 08:43:57 PM
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Here are four pictures.

Single fuel carburetor....
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Old 08-17-2017, 08:47:20 PM
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One of those shots shows the linkage for the governor system. Not familiar with the machine, I didn't understand what I was unscrewing when I took loose a rather long nut which protruded out the front of the fan housing when I was trying to get that assembly off.
The shot is looking inside the shroud.
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  #20  
Old 08-17-2017, 08:50:22 PM
JoeE. JoeE. is offline
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Default Re: Onan JB Thermomagnetic Choke

Would be nice to have the edit feature available, that way I could go back and edit the text with the pictures to explain what I was taking pictures of. Would save a lot of unnecessary replies....
Doesn't make a lot of sense to have THAT particular feature unavailable to certain members. How about swap that for "Smilies are not available"
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