Wound the JKSON/PMG up today to use some shop tools. Started, but would not run more than a minute. Cranking, could hear the injector creak, it would start, not run.
Bled fuel lines, same problem. Making a long one short, the original braided, banjo-ended flex line from the fuel filter to injector pump was clogged. I wondered how that could be, as the fuel is well filtered. Found the rubber liner was soft and swollen, allowing just enough fuel through for the injector to creak on start-up, but not sufficient fuel for the engine to run.
I have about 425 hours on the engine in an off-grid situation. Most hours logged in in winter. Always have used regular diesel fuel, no bio. A bit of old power saw and weed whacker gas gets mixed into the fuel once in a while. Seems odd that it took so long for the fuel line to deteriorate.
Had a bit of 1/4" fuel line and made up a replacement, all good now. The problem was most likely slowly developing over time, but presented itself only today. I was running yesterday to pump water, ran well then.
Glad the problem was a plugged line rather than a ruptured and leaking one.
Cheers,
Hugh