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Good morning everyone. I haven't posted in a while, but only because I haven't been able to acquire any generators at all lately. It's like the river has gone dry! I've seen a couple of them up on the GP auction, but they're all the way down in CA. With the fuel prices being so high, it's just...

I posted a thread a few days ago entitled “MEP-831A fuel pump.” I had recently acquired this machine from auction in non running condition. My first problem was no fuel out of the fuel pump. That problem has since been resolved. I figured that I should start a different thread now because I’m no...

Today I’ve been working on this MEP-831A 3kw unit. I bought it home a couple of weeks ago. Initially I found that the Yanmar engine was missing one of the rocker arms and it had a bent push rod. I was able to get those parts and I installed them today. It’s also missing the lever on the inside...

I’m struggling with a retrofit fuel drain on these 800 series generators. I purchased some 3/4” bulkhead fittings with 1/4” NPT internal threads. The nut size for these bulkhead fittings is 1”. I also purchased some 3/4” ID neoprene flat seals and some 3/4” ID flat washers to back them up. The...

I've been searching on this forum for an explanation of what a "Tier II Reset" involves. I placed it in the search field many different ways and I can't seem to come up with a good description of what is actually done to these generators during this procedure. I often get the question from a...

Just thinking about all of you who may live in the Midwest or the north east coast. Hoping that you all have working generators to take care of you when your power goes out. The weather report looks like you’re in for a difficult Christmas. I’m in the NW part of Washington. We’ve had a little...

1) I recently had a under voltage fault on a MEP-804A 15kw unit. I thought that I should chronicle the event here in an effort to give back to this great forum. Forgive me if this post is a little long. I’ll label each paragraph and if someone wants to chime in you can refer to that paragraph...

We just got a little snow here in the NW, and of course many of us lost power. Mine was out for a mere 3 hours today. I’m set up with an MEP-804A 10kw unit connected to my main panel with a 60 amp breaker and an interlock. It serves me well and I’m grateful to have it. It’s always interesting...

Good morning. I'm learning more about these wonderful machines all of the time. In the past 4 years or so I've had a variety of the 8XX series of generators go through my hands now. I recently brought home (2) of the MEP-804A units on trailers from Hermiston, Oregon. With these (2) units I've...

I posted a message a few weeks ago about this MEP-804A unit. When I picked it up from the GP auction site in Chehalis Washington it had an A/C volt meter in place of the M9 percent power gauge. I’ve sourced the correct gauge (used on eBay) and installed it today. From the wiring schematic I know...

I’ve been down a rabbit hole today while looking for some replacement pistons for this MEP-803A that I picked up last week from GP. This thing is the worst case of wet-stacking that I’ve seen yet since buying these machines. Low compression led me to remove the cylinder head. Then I found that 3...

It's been a while since I posted anything with you all. I had some open-heart surgery in December. Thankfully everything went well and I'm going to last a few more years it seems. I just picked up a MEP-803A 10KW unit and a MEP-804A 15KW unit at auction last week. Both of these were listed as...

I've got a question for those who are wiser than I. When looking at prospective generators to buy on Iron Planet or Government Planet I'm wondering what is a danger area as far as hours? I know this is an extremely vague question. In my experience with working around other types of equipment...

I’ve been researching how to make an economical way to accurately load test these awesome MEP generators. I came across a 1975 documentation from Caterpillar. It explains how to use a brine to load test generators. It got my attention enough to put it into practice. I used (3) of the grounding...

I’ve been playing around with these MEP generators for a few years now. Getting more acquainted with them each time I work on them. I recently picked up an MEP-803A 10kw unit with a bad oil leak from the rear main area. I ordered the seal and tackled that task yesterday. Not too bad at all, but...

I've been buying and selling the MEP generators for a couple of years now. When I "show" one to a perspective buyer I usually connect it to my shop main panel where I can turn on various different breakers to show that it's producing power. I've been looking for a load bank for a while now, and...

I've been buying and selling the MEP generators for a couple of years now. When I "show" one to a perspective buyer I usually connect it to my shop main panel where I can turn on various different breakers to show that it's producing power. I've been looking for a load bank for a while now, and...

Good evening. I just picked up a MEP-804A from Iron Planet today. When I originally bid on this unit I didn't see that it was missing the alternator, although they did post a short video of the unit running. I have read a bunch of the manuals but I can't seem to come up with a part number for...

Hello, new to the sight here. I appreciate all of the great information that's available. I recently acquired (2) MEP-803A generator sets from Iron Planet. I was able to get (1) of them up and running. Unfortunately for me the rain cap was gone from the other and the rain that we get up here in...