There are two MM's where I live, both belonging to my neighbors. Both have had the same problem bleeding the fuel system after a filter change - despite copious squirts and oozes of fuel from the cracked injector lines, it'll half-fire (just enough to freewheel the starter), and then stumble and die, over and over. We eventually got the first one bled, after several hour-long attempts, and it's been running great ever since, but I don't know we did it and I can't replicate the results on this other one.

Right now, I can get it to idle indefinitely, but the idle is low (600 when it should be 1200 with the high-idle cable pulled). When I press the accelerator, not much happens, and when I release it, the idle gets even lower and worse and wants to die. I've wasted what looks like a gallon of diesel fuel, several hours, and I'm at wits' end. Can anyone help? I'm not a complete noob with diesels; I've bled various tractor engines, a Mazda Perkins, VW's, all successfully...