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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
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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
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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 offline
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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
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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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