OK, it's 3:30 am and a 4-71 has kicked my behind.

At 11 pm tonight, I stepped in a 4-71 Generator that had just had it's fuel filters changed.

An experienced marine engineer had just changed both filters on a good running genny, and couldn't restart it.

We had 80 psi on a fuel pressure gauge on the outlet of the secondary filter, just before the engine, turning on the starter, with the return orifice out of the head, and no fuel coming out. The gauge held 12-15 psi with the engine not turning. We cracked the return lines from the injectors and spun it, no fuel. We cracked the pressure line to an injector, with the engine stopped, and got a spray of fuel. We spun it with the starter and got plenty of fuel to the injectors, and nothing out of them.

As I see it, the fuel is getting to the injectors, but not through them, WHY?

By now, the Capt says he's missed the tide, forget it, and the engineer will take it all apart tomorrow.

Thanks guys, I'm getting my second bath of the evening, and going to bed now, maybe one of you will have explained it when I get up.
Mitch

OK, it's 3:30 am and a 4-71 has kicked my behind.