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Onan 7.5 JB's Recovery Towards A New Life


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  #41  
Old 01-16-2017, 11:53:51 AM
Ray Lynch Ray Lynch is offline
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Default Re: My 7.5 JB's Recovery Towards A New Life

Quote:
Originally Posted by Leon N. View Post
Jim, what is a sealed marine regulator?
Leon
This is a pic of p/n 305-0688 which I believe is what Jim is referring to. The electronic parts are heavily coated to provide additional protection from the elements.
Began with Spec AD.
Ray
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  #42  
Old 01-16-2017, 12:39:32 PM
Leon N. Leon N. is online now
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Default Re: My 7.5 JB's Recovery Towards A New Life

Was the marine regulator an Onan built part? Looks like a nice unit. Does it work with the YD brushless designed generator? If so, does it have that voltage adjusting potentiometer that is frequently discussed?
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  #43  
Old 01-16-2017, 01:50:33 PM
Ray Lynch Ray Lynch is offline
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Default Re: My 7.5 JB's Recovery Towards A New Life

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Originally Posted by Leon N. View Post
Was the marine regulator an Onan built part?

Don't know.


Looks like a nice unit. Does it work with the YD brushless designed generator?

Yes. Works with the YD set.


If so, does it have that voltage adjusting potentiometer that is frequently discussed?
Yes. Has the potentiometer.

Ray
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  #44  
Old 01-16-2017, 02:38:19 PM
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Default Re: My 7.5 JB's Recovery Towards A New Life

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Originally Posted by JohnnyC View Post
The blue parts totes are blue parts totes. I work for a large BMW dealership in the parts and service department. Once in a while I'll use my vehicle to transport parts and the totes come handy for small parts that otherwise would get lost in the back of the vehicle. These totes were removed from my vehicle to make room for the transfer switch from Saturday's journey to Pa. Today they go back.

JohnnyC
New Jersey
Just some light harassment.... Someone seeing those on a youtube might get the wrong impression. I worked for BIG BROWN (UPS) for 30 years and if you took so much as a pen home, they could fire you.
That is a nice set to have! The 7.5, multi fuel JB is one of Onans BEST! I spent extra $$$ to make up the gauge panel for my JB. Good score.
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  #45  
Old 01-16-2017, 03:18:42 PM
len k len k is online now
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Default Re: My 7.5 JB's Recovery Towards A New Life

Nice looking gen!!! Real cream puff.

On mine the power connection box had an HUGE entrance hole in back for the wires and mice. Had to dig out 1/3 full box of mice debris. I'ld plug any excess space in yours with lots of electrical putty maybe ( bar of green monkey Sh*t). I hear there's something in it that they don't eat, maybe it's bitter.

I put same putty in big space in rubber grommet in side of control box.

Last edited by len k; 01-16-2017 at 04:01:17 PM.
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  #46  
Old 01-16-2017, 04:39:16 PM
geezer88 geezer88 is offline
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Talking Re: My 7.5 JB's Recovery Towards A New Life

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Originally Posted by len k View Post
I'ld plug any excess space in yours with lots of electrical putty maybe ( bar of green monkey Sh*t).
Out West it's known as Bear Sh*t

tom
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  #47  
Old 01-16-2017, 07:31:31 PM
JohnnyC JohnnyC is online now
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Default Re: My 7.5 JB's Recovery Towards A New Life

Quote:
Originally Posted by Ray Lynch View Post
Leon
This is a pic of p/n 305-0688 which I believe is what Jim is referring to (marine regulator). The electronic parts are heavily coated to provide additional protection from the elements.
Began with Spec AD.
Ray
This is the exact same regulator in my JB. I thought it was just a newer design, not a marine specific type of regulator .

JohnnyC
New Jersey

---------- Post added at 05:48:40 PM ---------- Previous post was at 05:45:51 PM ----------

Quote:
Originally Posted by Motorhead View Post
Just some light harassment.... Someone seeing those on a youtube might get the wrong impression. I worked for BIG BROWN (UPS) for 30 years and if you took so much as a pen home, they could fire you.
That is a nice set to have! The 7.5, multi fuel JB is one of Onans BEST! I spent extra $$$ to make up the gauge panel for my JB. Good score.
At work we have too many of these totes. They come to us from the main distributor and we can't get rid of them fast enough.

JohnnyC
New Jersey

---------- Post added at 05:51:31 PM ---------- Previous post was at 05:48:40 PM ----------

Quote:
Originally Posted by len k View Post
Nice looking gen!!! Real cream puff.

On mine the power connection box had an HUGE entrance hole in back for the wires and mice. Had to dig out 1/3 full box of mice debris. I'ld plug any excess space in yours with lots of electrical putty maybe ( bar of green monkey Sh*t). I hear there's something in it that they don't eat, maybe it's bitter.

I put same putty in big space in rubber grommet in side of control box.
Len, I am fully aware of the hole and the damages that will result once mice move in. Do you remember my 15.0 JC project several years ago? I had to rebuild the entire inside of the box and all the wiring. Kind of common for JCs and JBs. I was lucky since it was rodent free. It is so clean in there I found no dust.

JohnnyC
New Jersey

---------- Post added at 06:31:31 PM ---------- Previous post was at 05:51:31 PM ----------

JohnnyC's Executive Decision

After much thought and consideration from others not to repaint the JB, I decided to do a complete repaint of the JB as I did for all my other gensets over the past 3 years.

Although my newly acquired JB is pristine under the tins, the exterior side of the tins have many scratches and chipped paint. That bothers me and I can easily do the job. Another reason for a repaint is if I simply mount the JB onto a cart, the project would be done and then I'll start going CrAzY again looking for a new project and I may end up buying the hemi powered generator next week. What the hell am I going to do with a hemi powered generator? A hemi belongs in a hot rod....

My plans are as follows:

Tonight I will reconfigure the JB to 120/240 single phase. I will immediately start setting up for paint stripping in my workshop by collecting tools and organizing them. For the next week or two I will "play" with the JB as it is to see if anything needs attention. Afterwards the JB gets torn down into a zillion pieces.

JohnnyC
New Jersey
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  #48  
Old 01-16-2017, 09:57:15 PM
Jim Marcozzi Jim Marcozzi is offline
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Default Re: My 7.5 JB's Recovery Towards A New Life

It's an Onan OEM part. It's common in any of the marine destined sets, as it's potted. It's also used in the Protek PTO series gens.
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  #49  
Old 01-16-2017, 10:05:15 PM
Jim Marcozzi Jim Marcozzi is offline
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Default Re: My 7.5 JB's Recovery Towards A New Life

I just remembered....I have one sitting out in the driveway in the service truck that I keep stocked for the Proteks hanging under fire trucks.
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  #50  
Old 01-16-2017, 10:48:06 PM
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Default Re: My 7.5 JB's Recovery Towards A New Life

Let me ask you a question - Since my JB is not a marine genset (lived its live in an elementary school) did the potted regulator board come with the JB when new from the factory? Or the original unpotted regulator board replaced sometime during its lifetime with the potted version? Or common for Pennsylvania Onan genset requirements at that time (1991)?


What is today's cost for an exact replacement of the Onan potted regulator board?

JohnnyC
New Jersey
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  #51  
Old 01-16-2017, 10:52:01 PM
Jim Marcozzi Jim Marcozzi is offline
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Default Re: My 7.5 JB's Recovery Towards A New Life

I've never heard of a PA requirement of such. Most JB/JCs I've here have the standard regulator. From all I see, the "marine" potted reg was an option later on in the YD's life. I don't know what the option code was. I'm sure one of the database gurus may be able to figure out the option code.
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  #52  
Old 01-16-2017, 11:01:22 PM
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Default Re: My 7.5 JB's Recovery Towards A New Life

I think the potted regulators became standard in the later years. All of the JB's I've had had them, and none were 'marine'. I'd rather have the non-potted version myself, since they're repairable.
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  #53  
Old 01-16-2017, 11:13:42 PM
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Default Re: My 7.5 JB's Recovery Towards A New Life

My 1993 JB came from the factory with the potted regulator. I'd say yours is the original too. I picked up one that had no voltage pot control working from a member here. I carefully cut the metal case open, 1" x 1" on the soldered side of the voltage adjust pot. The solder joints were loose. I repaired them but have not had a chance to put it into my set to try it out.
Anybody see the harm in trying the repaired regulator into my set? I don't want to damage my generator end.
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  #54  
Old 01-16-2017, 11:27:22 PM
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Default Re: My 7.5 JB's Recovery Towards A New Life

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Originally Posted by Jim Marcozzi View Post
I've never heard of a PA requirement of such. Most JB/JCs I've here have the standard regulator. From all I see, the "marine" potted reg was an option later on in the YD's life. I don't know what the option code was. I'm sure one of the database gurus may be able to figure out the option code.
There is no option code listed for the potted regulator on my JB. I think Jim may be right that the potted version may have come standard on later J sets. My ex- 15.0JC made in 1983 had an unpotted PCB.

Out of curiosity what does the potted Kit cost new?

JohnnyC
New Jersey
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  #55  
Old 01-16-2017, 11:41:12 PM
len k len k is online now
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Default Re: My 7.5 JB's Recovery Towards A New Life

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Originally Posted by Motorhead View Post
.........I carefully cut the metal case open, 1" x 1" on the soldered side of the voltage adjust pot. The solder joints were loose. I repaired them but have not had a chance to put it into my set to try it out.
Anybody see the harm in trying the repaired regulator into my set? I don't want to damage my generator end.
I assume you did a good job and haven't been sloppy and bridged solder between the traces, so I'ld say it's fine. You can always test the reg on utility power and use a 60 watt light bulb as a load instead of gen field. Adjust the voltage pot and light should go on and off as you adjust the voltage set point
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  #56  
Old 01-16-2017, 11:47:32 PM
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Default Re: My 7.5 JB's Recovery Towards A New Life

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Originally Posted by JohnnyC View Post
...Out of curiosity what does the potted Kit cost new?
Call and ask. I'd guess about the same as you paid for your genset. Seriously.

Quote:
Originally Posted by Motorhead View Post
My 1993 JB came from the factory with the potted regulator. I'd say yours is the original too. I picked up one that had no voltage pot control working from a member here. I carefully cut the metal case open, 1" x 1" on the soldered side of the voltage adjust pot. The solder joints were loose. I repaired them but have not had a chance to put it into my set to try it out.
Anybody see the harm in trying the repaired regulator into my set? I don't want to damage my generator end.
Should be OK. You have a field circuit breaker, right?

BTW, I think there is a different wiring diagram pertaining to the sets w/ the marine regulator than what's shown in the YD manual...

https://www.dropbox.com/s/0rq7lpcrp3...50-AC.pdf?dl=0

Note it shows two different voltage regulators - potted and un-potted
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  #57  
Old 01-16-2017, 11:53:53 PM
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Default Re: My 7.5 JB's Recovery Towards A New Life

Quote:
Originally Posted by len k View Post
I assume you did a good job and haven't been sloppy and bridged solder between the traces, so I'ld say it's fine. You can always test the reg on utility power and use a 60 watt light bulb as a load instead of gen field. Adjust the voltage pot and light should go on and off as you adjust the voltage set point
len, I thought I saw somewhere here on the site on how to do the test the way you describe. Do you have a link to that way to test?

Jim, Yes my set does have the 2 amp field circuit breaker.
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  #58  
Old 01-17-2017, 12:05:21 AM
len k len k is online now
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Default Re: My 7.5 JB's Recovery Towards A New Life

Was Jim McIntyre's thread .
Let me look for it.

Basically instead of connecting reg's sense leads to gen 120V output you connect it to utility 120V. Just be careful as now some reg leads (including reg field output leads) are hot with respect to the earth/floor you are standing on (you can be shocked if you touch the wrong wire). For your safty good idea to power the reg from a GFI outlet, in case you touch something you shouldn't.

Found it.
https://www.smokstak.com/forum/showthread.php?t=146239

Last edited by len k; 01-17-2017 at 12:17:07 AM.
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Old 01-17-2017, 12:42:07 AM
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Default Re: Onan 7.5 JB's Recovery Towards A New Life

The last one of these that I bought was near $1200
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  #60  
Old 01-17-2017, 02:03:13 AM
Ray Lynch Ray Lynch is offline
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Default Re: Onan 7.5 JB's Recovery Towards A New Life

The potted marine regulator began at spec AD about mid 80's for the J sets best I can tell.
My set was built in 85, spec AD. Came out of a fire truck.
Flight Systems can repair them. $325
Ray
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