Diesel question

Lots of experience on gas engines, none on diesel except normal filter changes. After an hour on the bush hog, 3 cyl diesel wouldn't idle under 1000rpm. Just died. Cranked a long time before it started, then it sounded like a gas engine that was flooded. Starts super fast when cold. Any ideas? low compression? Same 135 with the dead multi-power.
 
Runs too good at 1500-2000 rpm to be a fuel filter. Whatever it is, dies at idle speed, but runs great at higher rpms.
 
Found this info. in the Archives:
Bob...
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Maybe someone messed with the idle stop screw, then it loosened, and backed off while you were using it, it lets the idle drop too far. Could possibly be the lift pump going away, and its not providing enough fuel at idle, but it can just keep up when its at operating speed.
 

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