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Onan Generators

Onan 12.5 JC Should I or shouldn't I?


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  #1  
Old 09-09-2017, 07:40:51 PM
Oldpart Oldpart is offline
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Default Onan 12.5 JC Should I or shouldn't I?

This set was listed on the Craigslist section here last month 8-22. I offered the guy $1,000.00 which is half of the ad price. I never heard back from him till today. He countered with $1,200.00 saying his wife wants it gone. The first photo is from the ad showing the installation but that is no longer reality. He moved and the generator is just sitting in his garage - second photo. He did not take the Garretson regulator so he can't demonstrate it running or pulling a load. I would probably buy the set as is since I've never run gaseous fuel. He bought it six years ago in Pittsburgh from US Steel I believe he said and it has always been maintained. Is the transfer switch a desirable one? I would run it on propane. What does anyone think?
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Old 09-09-2017, 07:49:23 PM
Oldpart Oldpart is offline
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Default Re: 12.5 JC Should I or shouldn't I?

Here is the link to the Craigslist ad here on the Stak. https://www.smokstak.com/forum/showthread.php?t=171226 It is single phase. I have geothermal heat so I need a bigger set to start the 3 ton compressor. Everything is electric in my home. I would switch to a propane stove which makes my wife happy.
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Old 09-09-2017, 07:58:20 PM
Wayne 440 Wayne 440 is offline
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Default Re: Onan 12.5 JC Should I or shouldn't I?

Only you can decide if you should buy it. He will probably take $1K for it if you show up with cash and a trailer.
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Old 09-09-2017, 08:00:36 PM
Oldpart Oldpart is offline
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Default Re: Onan 12.5 JC Should I or shouldn't I?

Is that the demand regulator touching the floor? Isn't there a regulator needed before the demand regulator to lower the pressure? I'm guessing that is the missing piece he mentioned.

---------- Post added at 08:00:36 PM ---------- Previous post was at 07:58:41 PM ----------

I will do just that offer 1K. I wanted to get other's opinion.
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Old 09-09-2017, 08:05:25 PM
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Default Re: Onan 12.5 JC Should I or shouldn't I?

The transfer switch is pretty useless. Haul it off if it's free, but don't plan to be able to use it.


Not being able to see it run ought to be a strong bargaining stance. You are taking a risk, and seller needs to adjust price accordingly.
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Old 09-09-2017, 08:11:44 PM
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Default Re: Onan 12.5 JC Should I or shouldn't I?

The gauges make the switch desirable to me. What is a good manual switch? I hoped this switch being from the 90's was useful.
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Old 09-09-2017, 08:30:24 PM
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Default Re: Onan 12.5 JC Should I or shouldn't I?

Here are some additional photos. He has the manuals also. I can't remember whether he has the muffler - I sure hope so.
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Old 09-09-2017, 08:39:08 PM
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Thumbs up Re: Onan 12.5 JC Should I or shouldn't I?

The Garretson demand reg is there. You'll just need a primary reg to make the generator run. They're a dime a dozen.
But I wouldn't EVEN start it before I bought it.
Back your trailer in, hand him 10 $100 bills ( preferably in front of his wife, if possible)
and I think you'll own it.
It's a single phase and that makes it very desirable. For all we know, it could be a tri-fuel!
Best of luck.
Let us know.
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Old 09-09-2017, 09:06:33 PM
len k len k is online now
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Default Re: Onan 12.5 JC Should I or shouldn't I?

Lot of money for a unit that he can't show runs and makes AC, I'ld chop the price a LOT.

Other issue is genhead is only 12.5kw , but engine has baseline no-load fuel consumption of a 15 kw. If I have to fuel a 15 kw engine I'ld want to be able to get up to 15kw. IF I needed it.

Best to get full model number and Make sure it can make full 12.5 kw into single phase, most 3 phase gens can only make 2/3 of rated kw into single phase unless has B150 ( extended stack option)
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Old 09-09-2017, 09:35:25 PM
KPack KPack is offline
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Default Re: Onan 12.5 JC Should I or shouldn't I?

It's a single phase unit so it should do 12.5. Now a 1000 is pretty high for a unit you can't see running and producing electric but if you want to roll the dice it's your 1000.
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Old 09-09-2017, 09:48:22 PM
MBB MBB is offline
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Default Re: Onan 12.5 JC Should I or shouldn't I?

Here is the build sheet.
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Old 09-09-2017, 10:08:22 PM
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Default Re: Onan 12.5 JC Should I or shouldn't I?

Quote:
Originally Posted by Wayne 440 View Post
Only you can decide if you should buy it. He will probably take $1K for it if you show up with cash and a trailer.

Wayne I was going to do the same thing to a seller but park my truck and trailer out of sight so as not to show my eagerness,

Do you think the trailer increases your bargaining power ?
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Old 09-09-2017, 10:25:54 PM
Wayne 440 Wayne 440 is offline
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Default Re: Onan 12.5 JC Should I or shouldn't I?

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Originally Posted by wxyoung2008 View Post
Wayne...Do you think the trailer increases your bargaining power ?
It depends.

IF the seller is one of those who would rather wait 6 months to try and get another $50, probably not.

IF the seller is one whose wife has said "get rid of that thing...", the mentioned wife is there, and you show up with a trailer and cash- almost certainly.

I was in the midst of negotiations for a BGE once (truck ready to haul), while the wife/GF (?) looked on. I had made my last offer and turned to leave when the young woman stepped in and said "sold", and put out HER hand for the cash- the seller just shrugged and started getting it ready to load.

To me a person who shows up with a truck/trailer and ability to load it up immediately is a serious buyer; but on the other hand, isn't likely to make a return trip. So I generally offer the best deal I can, if I want to sell.
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Old 09-09-2017, 10:33:32 PM
len k len k is online now
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Default Re: Onan 12.5 JC Should I or shouldn't I?

When I bought my 7NHM guy wanted $400, it wouldn't make AC and didn't really run for all the hunting and stalling, had to hot wire it even. I did some electrical tests on genhead and it showed ~good, used meter, not a light bulb that he could see. Wasn't sure engine was good but finally I saw it do something that showed it was good. I offered $200 guy, said no. I packed up my tools into car and stopped talking about gen. And we chatted for a while about his other MANY "projects" in his yard, that he said he likely will never get to. Said I have to leave it's a 2 hour drive, and offered $100, he said no he'll use engine for a log splitter that I saw nearby. I said 200 he agreed. Cleaned the plugged carb ran perfect , except needs a choke heater, and a new AC voltage reg.

Last edited by len k; 09-09-2017 at 10:43:33 PM.
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Old 09-09-2017, 11:30:40 PM
wxyoung2008 wxyoung2008 is offline
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Default Re: Onan 12.5 JC Should I or shouldn't I?

At this point OldPart you are the driver. If you haven't replied one way or another I would tell him that you tried to squeeze another $200 from the wife but she wouldn't budge. Tell him you have reluctantly been looking at a Generac 13000 and it looks like that is the way that you will have to go.Thank him for remembering you and complement his generator . Wait one day. If he doesn't get back to you , you can either find $200 more dollars or buy the "fake" Generac.

The Onan will still be there.
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Old 09-10-2017, 02:45:14 AM
Ray Lynch Ray Lynch is offline
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Default Re: Onan 12.5 JC Should I or shouldn't I?

38 year old set. Not a trifuel. Can't/won't demonstrate it to run and make power. Your cost to bring propane to it. Point all this out to seller. Make sure the engine isn't locked up. Looks like the muffler is laying on top of the set in one of the pictures.
$1000 is a lot to potentially lose if it turns out to be a turkey.
Good luck.
Ray
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Old 09-10-2017, 07:29:08 AM
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Default Re: Onan 12.5 JC Should I or shouldn't I?

Thanks to all for the advice. I don't plan to spend more than $1K. I don't plan to drive there with him thinking I'll spend more than that. If I can turn it over and the oil is reasonably clean I'll offer $800 since I need a transfer switch, but I'll take it for a thousand. I wish it were a 15; and I wish it were a magneciter, but I think this will work for my needs. We have my wife's parents living with us. Our power rarely goes off but it has gone off for a short time twice in the year plus that they have been here. Having six Onans and none hooked up permanently does not impress them.
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Old 09-10-2017, 08:43:55 AM
Wayne 440 Wayne 440 is offline
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Default Re: Onan 12.5 JC Should I or shouldn't I?

Quote:
Originally Posted by Oldpart View Post
...We have my wife's parents living with us....Having six Onans and none hooked up permanently does not impress them.
I they want to be impressed, let them supply the $1K...
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Old 09-10-2017, 09:20:26 AM
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Default Re: Onan 12.5 JC Should I or shouldn't I?

As I've said on this forum many times, buying a non running generator, what I like to call a "cold hunk of metal sitting on the ground" is like buying a pig in a poke. You may get lucky, and you may not. And if you don't get lucky, the seller is going to shrug his shoulders and say something like "well... it DID run good". If the seller wants much more than scrap pricing, it's up to him to demonstrate to you, the buyer, that you are buying more than a piece of junk.
If you are going to buy a used car, wouldn't you want to take it for a drive? If you are buying a used TV, wouldn't you want to turn it on and check the picture? Why should it be any different for a generator? He didn't take the Garretson so he can't show it running? That's his problem, not yours.
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Old 09-10-2017, 11:35:35 AM
len k len k is online now
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Default Re: Onan 12.5 JC Should I or shouldn't I?

Would be suspious that he didn't know enough to take the Garretson regulator.

For $1000 he's got to show you it runs and makes AC.

If he has your phone number I'ld let him sit with it for a month, at $1000 and not running people will not be beating a path to his door. Then offer $500-700 if your willing to lose the money if it's bad.

Can't get all worked up about one $$$$$$$ gen, there will be others for sale.

Last edited by len k; 09-10-2017 at 12:01:21 PM.
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