I have a 1999 763 with a deisel engine. On average how long does it take to get the engine out? Are they a real pain in the butt? This thing has 2000 hrs and is totally caked with greasy gunk in the engine compartment. It needs new belts, the fuel gage is not working properly, it needs powerwashed and I have a couple of minor hard to get to leaks. Would it be better to replace stuff and clean as good as I can with the engine left in or yank the engine out?. I am very mechanically inclined so that is not an issue. Thanks for any info.