FS: NOS Powermaster Onboard welder (Mobi-arc 200x) $350 shipped

A friend and I recently acquired seven of these onboard welders. These were made when Powermaster (the alternator/starter company) was thinking of offering a new product line. They contracted-out to Mobi-arc, who made these private label units. These welders are brand-new (never used), however they carry no warranty of any kind. The specs on these units are the same as the 200x unit offered by mobi-arc, so I believe they are basically rebranded 200x units. As that is the case, these will likely require modifications to your alternator. You can get these accomplished in various places, and I can help you if necessary. However, the price is just for the welders - and it is $350 shipped in the USA. International shipping available at an increased price. These seven are the only ones that I know of (well, we bought ten but are keeping three), so once they are gone I will never have any others. :ylsmoke:

Modifications:
The welder is basically an external regulator. Wiring-up the main cables is easy, the only "hard" part is wiring the 10-pin connector. It requires connections made to field + and field - (field - would be a ground to the housing unless using a dual field alternator), Battery or diode trio, Tach out, ignition switch 12v, alternator warning light, battery ground. Your internally regulated alternator will need to be modified to accept these connections. If you are running an externally-regulated unit, you have these connections already. This can be accomplished for $120 which includes shipping back to you in the U.S. (International would be a little more expensive due to the shipping). If you are handy with wiring diagrams/and a soldering iron and are comfortable taking your alternator apart, you can accomplish this on your own. Of course, the welder comes with instructions which explain all of this. Here is a good write-up of what it takes to modify your own alternator:

http://www.parksoffroad.com/miscinstalls/welderreview/mobi/mobimain.htm

Again, I am happy to offer a service through mechman for modifying your alternator for $120 including shipping back to you, or I can price you a high-out aftermarket replacement with a two-year warranty - but you are welcome to do it on your own. Obviously, please be confident in your skills before attempting this on your own. A mistake could create a dangerous situation.

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PM SENT.....

PM replied

So do you garantee them to work?

I certainly may be willing to replace a defective unit with another (if I have them, on a case by case basis). Obviously I don't want to sell anyone anything that does not work, but if I sold one and the person waited a month or two to tell me it didn't work- I have no way of knowing for a fact if the failure was pre-sale or if something happened while in their care. A guarantee would be too much of a slippery slope in this case. However, I would imagine that these units passed some sort of quality control when they left Mobi-arc's facility. Of course, that was some time ago. Also, you would have to check, but I believe these units will be supported by Mobi Arc. Meaning that they may offer service or repair (at your cost). Again, you would have to check with them. Obviously, I am not affiliated with Mobi-Arc or Powermaster.

Check your PMs - sent one yesterday with a few questions.

Hey Jim K, I didnt see a PM from you. Resend it please!
 
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If they had a guarantee I'd grab one...

Sorry, because of the level of difficulty for a proper install, I am not willing to offer a guarantee. Also, because you are not buying these units from Mobi-Arc - I doubt they would offer any warranty support. As I said above, I may be willing to swap-out a defective unit on a case by case basis (if I have them) - but that is also not guaranteed.
 
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RocKrawler

Supporting Sponsor
Thats more than fair, I didn't want to get stuck with one that's doa. Does the Manuel specify a required alternator rating? I'll check with mobi-arc when I get back to town Monday for requirements and to make sure they can still service these in the future if needed and get back to you.

Sent from my ADR6400L using Tapatalk 2
 
PM re-sent.

PM replied

Thats more than fair, I didn't want to get stuck with one that's doa. Does the Manuel specify a required alternator rating? I'll check with mobi-arc when I get back to town Monday for requirements and to make sure they can still service these in the future if needed and get back to you.

Sent from my ADR6400L using Tapatalk 2

As I told Jim in a PM, and I will elaborate here: The amperage output of your alternator is going to have a similar effect as the amperage (heat) knob on your welder at home. The less amperage the cooler weld, which will affect efficiency, etc. Obviously nobody is buying these welders to assemble a steel structure, but you still want them to operate fairly well for trail fixes. That said, I feel like 150amp would be a good number with a minimum being 130. I know there are people that use these welders with an 80amp alternator that overheats and is generally a POS, and thats fine for them. However, I wouldnt do it. I would imagine mobi-arc will treat this the same as if you bought a used unit from someone else. Obviously no warranty coverage, but pay-as-you-go service and support. Of course, I have not confirmed this with them. (nor have I had any communication with them at all).
 

jeepdreamer

Expedition Leader
If I hadn't of just dropped money on my new bumper I would buy one... I'll keep watching and if you still have one in a couple weeks, I'll buy. :) If your willing to ship to a military APO that is?
 
If I hadn't of just dropped money on my new bumper I would buy one... I'll keep watching and if you still have one in a couple weeks, I'll buy. :) If your willing to ship to a military APO that is?

Sure! I don't think shipping will be a problem, I think USPS even has a flat rate box for that!
 

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