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The pic to me looks like an injector pump...though I'm a new 803 owner.
I'd guess the rubber line is on the suction side of the injector pump. I'll pull that and see if you have flow and temporarily connect a fuel pressure gauge there.
I bought a running 803 on govplanet last month. Guys here on Steelsoldiers were a big help in getting in operating in tip top shape. I love the idea of getting an engine from a 400hz unit. Good luck.
Update:
Got the pressure gauge. Got a small load center and some heaters.
I've been running it as hard as it would allow. Was still struggling to get above 75% load and frequency was up and down plus and minus 2 hz.
I made up a punch list of things from all of your suggestions. In working...
Uniquify,
I'll investigate the pick up tube. I will say, in the process of bleeding the fuel system, I had a lot of flow.
I will take note of the smoke color when I get the dummy load set up.
The batterys are brand new and fully charged.
I don't have a fuel pressure gauge, but I'm not...
Ray70,
The unit run OK, but the slight variations in voltage and/or frequency wreak havoc on my computer UPS. Granted, its a cheapo UPS; I've got a rack mounted one that does fine with it. I have seen videos of others machines with rock steady voltage frequency up through and past 100% load...
I won an auction last week on a 900 hour 803A that ran. The frequency and voltage tend to fluctuate slightly. I have found a tremendous amount of good information so far on the site, but I'm still struggling. My initial though was a fuel issue. So far I've: replaced the fuel pump, replaced...
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