MEP-831A with dead inverter, would Gen Head from MEP-016D work on it?

[jas671]

I've got a MEP-831A with a dead inverter.
It had only been putting power out one phase. Four of the eight PCB mounted fuses that are near the connectors that input the power from the PMA were blown. I replaced them.

All appeared to be good initially. I started the engine, and was getting good 240VAC out of it. I walked away to get a couple of 1500W heaters to connect to it and load test. In that short time, it shutoff with an over voltage fault.

Now when I start it, there is no voltage coming out of the inverter at all (measured right at the inverter output terminals).

Obviously, whatever blew those fuses is a permanent problem, and not just a temporary overload or something.

As I have another, working MEP-831A, I don't feel that it is worth spending $539 for the 4.2KW MECC on this, and then still have buy the fixed speed 3600 RPM controller board.

In addition to this, I also have a MEP-016D with a seized engine.

For those who are not familiar, the MEP-016D is an MEP-016A or MEP-016C that has been re-powered with a Yanmar L70A engine, same engine as the MEP-831A.

I am thinking that I can combine these two units to make a working generator. IF the tapered output shaft of the engine is the same on both units.

There are two ways I could go. I could transplant the engine from the MEP-831A into the MEP-016D, or remove the inverter and PMA from the MEP-831A and transplant the gen-head from the MEP-016D.

This second approach would be more more desirable I would think as it keeps it enclosed and a little quieter.

Thoughts on this? Has anyone done such a convertion?

 

[Ray70]

@kloppk will be along shortly. He has a solution for you speed controller issue and probably knows if the 016 head will fit on the 813's motor.
I'm guessing they will bolt together, but I have no idea on how the engine controls and AC side of things would need to be integrated.

 

[kloppk]

I don't know if the gen head from the 16D would fit onto the 831's engine.
The 831's engine accepts a J609B gen head. (Mechanical mounting & tapered shaft)
I do make a conversion kit that includes the 3,600 RPM GC for doing the 831 Inverter/PMA swap to a convention gen head.
It governs engine speed to +/- 0.2 Hz and restores OL, SC protections as well an %Load Meter and AC Voltage meter operation.

 

[LuckeyD]

No it won't. Not without the regulator. Same engine as the D conversion, but regulators were different. Then comes the hook ups. at the load terminal boards and their filter and main contactor. Without the inverter you will have the room but it will take a bit of thought to be right. Once done you should be good