Mechanical Inspection - Why was it so hard

 I'm a bit behind but let's just say this little act caused a lot of drama.  All was good after our survey.  Strangely enough the sellers broker offered to negotiate on price after the survey and after a little back and fourth we agreed on a price that was within a few thousand of what I had hoped to buy the boat for.  My plan was to wait for all of the inspections to be completed before opening up the negations but who am I to complain when someone offers to lower the price which might have given me another chance to beat them down should something come of the next inspection.  Anyway next up was the mechanical inspection.  The mechanic I had called about 3-4 weeks prior decided he was too busy and canceled.  This sent the sellers broker into a tissy.  To this point we still had been working on good faith but when I told him we were not closing until the mechanical inspection was done he decided to create a lot of drama.  From what I can tell all the childish nonsense came directly from him and not his buyers that he was representing.  It was weird.  Anyway long story short we gave him a 10% deposit on the boat and now had 20 days to get the inspection or the boat would be back on the market.  Lucky we were able to get Cummins to come inspect both engines (generator & main engine) within 14 days of calling them.  They were going to cost me about 3x more then the local mechanic but after talking with several other diesel mechanics all told me it was worth the money and the right thing to do with an engine that had over 6000hrs on it.

The mechanic showed up, we took the boat out ran it at various speeds for a bit, asked a number of questions.  Overall everything looked good from his perspective.  Turned out the low oil pressure light was coming on because the idle was not set high enough and he adjusted it when we got in.  It appeared the person maintaining the boat had changed the oil early in the spring when we looked at the boat the first time so I did not have much hope for a oil analysis.  I suspect the same guy had changed the oil again prior to this inspection but insisted it just ran really clean.  The tech took an oil sample anyway and surprise surprise it came back clean.  The engine sounds good, starts easy, and neither the tech or I noticed any leaking so I decided to take the risk add the cost of an engine rebuild to the emergency kitty and move on with the sale.  Bottom line we really didn't have much choice at this point.  There were not many other boats for sale in our area that were close to what we were looking for and I think the guy maintaining the boat just really wanted it to show at its best.  Hopefully this is true & everything will run fine for us!