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Jeeepadict, I notice your location is Round Mountain, NV and some Google'ing shows your elevation somewhere between 5000 and 7000 ft ASL. NA engines lose 3% of their output per 1000 ft of elevation. Now the MEP generators have some overhead built into their design, but they do have a derating...

Sounds like you found a good one! That fuse is a modification from the original design, commonly referred to as the "quad-fuse". There is a winding in the generator head that provides medium voltage AC power to the voltage regulator. That AC power is rectified through a diode bridge in the...

Nothing critical. I was running a new-to-me 802a for the first time and watched a few embers jump out of the exhaust. I was looking for that video to show a friend what happened.

I'm looking for an old video that was likely posted here. Guy was running a wet stacked 802 or 803a (maybe) on a load bank to burn it out. I remember embers coming out of the exhaust. Thanks

Good advice. You might end up cannibalizing one for another. Or you can be a fool like me and buy one for parts, only to turn around and get it running. Welcome to the forum, this is a great group of people with a ton of knowledge.

My first thought was an ATV/SxS lift, but you would need to fabricate some crossbars to interface with the skid amd find a way to lift it onto the ATV lift...

Thanks guys! I did exercise the switches, but didn't Deoxit.

So I got another non-runner going again. I bought this one as a parts pile for my main unit, but I got the engine going and thought with some repairs, this unit could be a completed runner. It's been a struggle with missing and broken bits, but today I was able to throw a load on this unit and...

I don't recall off the top of my head what the threaded interface is on the DN2M and DN4M blocks, but the sensor is not that special. It is a fairlt standard 240-33 ohm sensor and will work with 12v or 24v gauges. So if you can find one rated for 240°F @ ~33 Ohms that fits the hole in the...

Chilbun, do you happen to own an oscilliscope?

Also rotate the engine by hand and look at the flywheel through the vent holes in the generator head. People have a tendency to jam a screw driver in there when loosening or tightening the crank pulley and could have damaged the flywheel, throwing off its balance.

I'll 2nd that. I bought a MEP-802a with a stuck pressure relief. The oil pressure was spiking to 220 psi before the lifters locked out and the engine died. Surprised the oil filter survived.

Any update on this? I'm having a similar problem with one of the 802's

You have the quad-fuse already, but plan to add the MOV to the voltage regulator.

For the CAD guys, I made package models of the -802 and -803 to use for a project. I'm sharing them on GrabCAD if you have a need. They are accurate enough for building a trailer or mounting platform. MEP-802a MEP-803a

Does anyone know how many 802a's and 803a were produced?

You will hear it here sooner or later, but have you downloaded and read the TM for your 805? I know it sounds like an internet cop-out, but those manuals are really good at diagnosing normal issues. That said, you mentioned you have voltage to the K2 relay. I assume that is power to the...

This thread is a blast from the past. I'm up to 4 units now, haha

Thanks Guyfang for helping me understand how to read the harness diagrams, I'm glad I ordered the right housings. Here is the parts I ordered: Fuel pump connector housing: Molex 03-09-2022 Harness connector housing Molex 03-09-1022 The pins were the hardest part to figure out. I ended up...

I'm not knowledgable about 501A's specifically, but that looks like the Field coil connector. The field coil generates that magnetic field that drives the stator coil to make electricity. If there is no power to the field, you will get no power out of the stator.