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Good advice so far! I would add that if it is a 601 then the diesel is a 144 CID engine. A 172 CID diesel is a drop in replacement. The timing on the early diesels was too retarded adn on later models, changed by Ford. The change was retroactive to prior models too. I think (? no manual in front of me) it is 22 or 23 degrees for the 144's, but check the manual! Retarded timing will make it much harder to start. Also, there are two glow plugs in the intake manifold. They look like spark plugs from the outside. Make sure they are good. An ohm meter will read 1 ohm or a little less for an individual glow plug. They will draw over 100 amps so there is a relay like a starter relay to activate them. The momentary push button switch is on the left side of the tin work, hidden under it kind of. If you don't have glow plugs or if they are not operable, get em / fix em. Give the engine 15-20 seconds of plugs and it will start much easier. If you still have issues with the timing correct and using glow plugs your next check is the injectors. Personally, I would get some rebuilt ones off the guy in Minnesota that sells them on ebay for $25 each. The manual will tell you how to change them. If all that is done and you still have problems, you are starting to look at money. Pump rebuild -> $600 or/and engine rebuild -> $2000. Now you know why I mentioned that the 172 diesel is a drop in replacement... jb
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