I've got 245 hours on my 200 Yamaha HPDI, I bought it last year with 145 hours. Already put on 45 hours this year alone in just 2 trips to Cape Cod and Marthas Vineyard (for a week of incredible fishing I might add). Granted many of my hours have been very low rpms fishing rips etc.. I haven't had to do a thing to the motor so far, it runs great, starts every time first try and I consider it just broken in! As already mentioned as long as it was taken care of properly, winterized etc, it should be fine. I would get it tested as Putershark mentioned since someone else was using it.