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My thinking is leaning toward wrong shunt rather than defective. Short of corrosion, not much can go wrong with a 1/4" wide strip of brass.

I probed around today, disconnected the meter wires and ohmmeter verified they actually go to the shunt (with them connected, one wire was always 0.5 ohms). Then I fired up the generator and noted that I have about 27 V on the FU1. It's the same voltage on both sides of the shunt. So the round...

All I'm trying to say is that it is reasonable to know the operational status of what you are selling and be up front about any malfunctions. Throwing in a digital meter isn't going to solve the problem if the voltage to the meter is missing. I've said this in post 60 and again in later posts...

I did say in post #70 that there was only 2mV across the gauge and I suspected the problem was never the gauge itself. You assumed it was the gauge and, without consulting with me, sent me another gauge for a problem that is elsewhere in the system. Where are these numbers on the wires? I see...

Hi Rich, received the gauge today and installed it. Unfortunately, still the same result. Barely moves when the battery is charging. There is only 2-5mV across the gauge (an amp clamp on the battery cable shows more than 8 amps going into the battery), which indicated to me that it is not a...

Pardon me if I seem a bit cranky. It's not been a good year for me. Two heart attacks, $182K in medical debt and just about everything breaking/failing around here. I spent the extra money because I was under the impression that the unit was completely rebuilt and fully functional. As I said...

Not "fighting" your responses, just reporting my observations. If you read them through, you will find that: I measured 8.3 amps with a clamp on ammeter on the battery cable. The in built meter measured, 2mV stable after peaking at 5mV at startup. It is nowhere near 25mV across the meter...

I did this test last week and read about 2mV across the meter. Started at 4 or 5mV then settled to about 2 mV. I didn't buy this at auction. It was not cheap. I spent a fortune on it, with the understanding that it was fully functional. There was a cheaper unit nearby to me, but the fuel gauge...

I put a clamp on ammeter on the battery terminal and started the engine. I saw 8.3 amps current into the battery., But the meter sits on the border of red-green and doesn't move.

Presently, I don't have access to a forklift. Excavator is still down. A high pressure line in the rotex burst open. Repair is going to need financing, as I've zero savings at this point. Today, solar is not generating enough power to overcome the base load, so I'm running the generator...

I got that idea from another post I read on checking the charging system somewhere on this forum. But your concerns are taken with due concern.

That sounds like a lot of work and requires a crane or heavy machinery to tip the generator. I'd opt for the vacuum method, as it seems much less dangerous.

Some waveform tests I did this evening. Interesting that it cleans up under a heavy load. EG4 chargers have a .99 power factor. No Load (except oscilloscope and isolation transformer: Contactor turned on, powering two exhaust fans: Fans + two 5kW Chargeverters running:

Your post prompted me to do some research. Apparently we're supposed to use a special coolant fluid: " To counteract the effects of cavitation, diesel coolant contains special additives (primarily nitrite). Nitrite works by coating the metal components that are in contact with the coolant. The...

So it's different than automotive overflow bottles that just act as expansion tanks, filling when hot, emptying back into the radiator when cold? You're scaring me about this vacuum requirement. I know that's the case with refrigeration, but never heard of an engine where you can't flush the...

I was surprised especially since the batteries that are in there are much smaller than a standard car battery, only taking about 2/3 of the battery tray width. So I would have expected some sag on startup, but who knows? As I mentioned, I saw a video recently where the presenter mentioned brand...

Thanks for the pertinent page of the manual. As I mentioned, I did that test and it peaked at 5mV and rolled back to about 2 mV after a few moments. Those must be some super-duper low internal resistance batteries, because I watched one other video last week where the presenter mentioned he...

A few days earlier I did put a meter across the alternator terminals as instructed, and read 26.5 volts with engine running. I just want to be sure the unit is 100% working the way intended. Does anyone know how many millivolts it takes to deflect the meter full scale?

I did a few tests today: Placed a voltmeter across the battery meter terminals and started the generator. It read -5mV then ramped down to -3mV. Then I did the removal of FU1. With it removed, the needle moved less than 1mm into the red, about a needle thickness. With the fuse installed, it...

Guys, thank you for all the advice on the fuel tanks. I am thinking that 55 gallons should be enough, but I want a tank that the oil delivery guys will not have a problem with filling. That said, I've watched many MEP803A startup videos and in every one of them the battery meter moves to the...