Converting a MEP-831A to standard generator

dav5

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2 Controller Kit spoken for. Leaves 2 of them now.
Kurt,
After I install your controller I will have a spare inverter that works only when battle short is on. I seem to remember you thinking that the problem with the inverters was that they weren't potted properly. Is it worth drying them out and potting them? I could use it as a spare on my 2nd 831A. OR should I just mount it near the entrance to my shop as a daily reminder to never ever buy another 831A. As much as I hate the original machine I am excited to convert it. Your governor controller and conversion kit plus that sweet little Yamaha diesel should result in a great generator. I should even be able to reinstall my original water heater elements at my camp now that 4.2 KVA is being produced
 

kloppk

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Kurt,
...Is it worth drying them out and potting them? I could use it as a spare on my 2nd 831A...
It's worth a shot to dry the main circuit board and seal the 12 or so potentiometers on it. The rest of the board is well potted. It's just the potentiometers that aren't potted or sealed.
The main board is on the engine side of the inverter. As I recall you have to take the top panel and that side panel off to access and remove that board. I've always removed that board without the inverter in the generator. I don't know if the board can be removed without removing the inverter.
You can seal them with commercial conformal coat such as MG Chemicals 419D or just use some nail polish.

Kurt,
...OR should I just mount it near the entrance to my shop as a daily reminder to never ever buy another 831A...
:LOL:

This is the main board. Potentiometers are the blue & white items scattered all over the board. Main Board.JPG
 
Last edited:

kloppk

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A friend of mine ended up with an extra new Alt Mecc generator generator head for doing the 831 conversion.
He has no need for it and is looking to sell it.
If interested contact Mark at: mark.neil@verizon.net
He's located in S.E. Massachusetts
 

dav5

Active member
369
117
43
Location
Mono, Ontario
A friend of mine ended up with an extra new Alt Mecc generator generator head for doing the 831 conversion.
He has no need for it and is looking to sell it.
If interested contact Mark at: mark.neil@verizon.net
He's located in S.E. Massachusetts
I just finished installing the Alt Mecc head on my 831A. I haven't finished the electrical connections but the Alt Mecc gen head fits perfectly and is a breeze to couple with the Yanmar engine following Kurt's instructions. It is not a matter of if the OEM inverter is going to fail it is when.
 
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