3500 hours .... is that considered excessive for a 12 year old motorboat?

[Momac]

So

So 400hp engines need rebuilt after a few hours?

I didn't say that.
People are more concerned about engine repair cost risk with powerful motorboats because the cost could be a significant proportion of the value of the boat.

 

[Orthop]

Perhaps, but back in the real world it would be good to hear from anyone who’s had to go through the process you’ve just described on D6’s for real.
Anyone???

I have rebuilt a D4 300, due to a broken piston this year. Read more "piston broke d4 300 at 420 hours". We ordered a long block from VP. Now after 20K € lighter I have 30 hrs on the new engine and everything works fine. Warranty for 2 years for the rebuilt engine...

 

[Switch]

I have rebuilt a D4 300, due to a broken piston this year. Read more "piston broke d4 300 at 420 hours". We ordered a long block from VP. Now after 20K € lighter I have 30 hrs on the new engine and everything works fine. Warranty for 2 years for the rebuilt engine...

Sorry to hear that. However, your problems weren’t caused by excessive hours more like a duff engine.

 

[Orthop]

I bought the boat from new...And please believe me for the maintenance and service I did everything imaginable. Most issues I had are due to less use...
I make 50-60 hrs. a year, and keep the boat in a hall for about 6 month during the winter period...