OT: Diesel Hot start problem cranks and cranks no start

[Locutus]

I have a 95 F-350 Power Stoke Diesel that I use at work. Most of the time we leave it running when we are getting in and out but if we are going to be out for a few hours we shut it off. Some times we have to go right back out again and when we try to start it it will crank and crank and crank, and then finally fire up. Some times it will crank and crank and crank and never start. I know this is off topic but there are alot of sharp gear heads here and I hope one of you knows the answer.



Mike