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If compressed air isn't enough, with how thick tank sludge can be taking it out is really the best option. You can disconnect the fuel line from it to the pump and inspect that first, before having to take the pickup out (in case the blockage is there).

If you were impatient you could always make a quick jumper cable with alligator clips to jump the two pins together to see if it fires. I wouldn't... but you could.

Does it spin by the dead crank switch?

No problem. Can't even ship the parts to you, for what Mouser lists them for. Hopefully you are operational soon.

As I told the OP by private message, I actually sold this machine to the current owner in TX. It was completely gone through, load banked, tested, and confirmed as fully operational. The quad fuse you see came that way from reset (versus the panel mount most are familiar with). I have seen this...

Well without any machine NSN or TM numbers to reference, just kind of shooting in the dark. Here is a universal pump you may be able to adapt: https://www.rockauto.com/en/parts/airtex,E8131,fuel+pump,6256

https://www.mouser.com/ProductDetail/504-BK-HKP-R https://www.mouser.com/ProductDetail/504-BK-ABC-30-R

I have some black versions of it in stock new, you would just need to solder new wires to it (it has tabs, just like the OEM). If you were interested.

So the pump was inverted, or someone rerouted the fuel lines? One is a hard line, so thats not the easiest to accomplish. At least it was figured out.

I don't see a keyway on the ID of that pulley, and the Leece Neville unit is keyed. FWIW

Full dimensional details are here: https://www.wbparts.com/rfq/3020-01-382-8782.html

Unfortunately it seems the one I thought I had I no longer do. Only pulleys that seem to be in stock at the moment are crank pulleys with the reverse rotation bolts. I even checked my rebuilt alternators boxed on the shelf, thinking I maybe sent it out... Nada. I will keep looking, and if I...

I may have one, I need to look.

So the metering pumps appear to be clocked correctly... one may be leaking slightly (or its the fuel hose going to the barb, but very slight).... how about the above photo though? Did you let out the tension on the frequency adjustment knob up front? That rotating assembly should be touching or...

Yes if you can take a photo of the position of where the main fuel lines (off the hard line from the filter) go into the metering pumps.

I wouldn't adjust the governor just yet. I suggest you put a full can of seafoam in the fuel tank, and run it at 70-75% rated current figure you call out (before the issues start happening) for as long as your fuel allows (or make sure the tank is at least half full) and run it till its almost...

I have no horse in the race, but I don't think he was tryin to come off that like. For whatever its worth.

If the machine is new to you, just get it up to operating temperature and step it up to 100% rated load at whatever interval works best for your days timing. Me? If its new, I get it to temp and have no issue getting it to max load ASAP... I only take my time if its new in my hands. As...

I may have a spare knob and set screw for that style switch. Will have to look around.

I don't have experience with that set, but I am almost certain its critical to function. I would say those sets, at this point, are worth what their parts alone will bring. The engines being the most valuable piece.