New Engines !

[Red-Leader]

Looking around for a fast 25 + ft offshore boat and find it strange that most boats have been re-engined !
Why if these boats are so little used do they need to have new engines, or indeed so much spent on the engines for very little use.
Even the diesel versions of various ages seem to suffer with complete engine replacements.
You expect a lot more use from a road engine.

R-L

[Renegade]

Not sure what exact scenarios you mean but maybe some boats had more fuel efficient engines? ie petrol to diesel or carb to fuel injection?
just my thoughts.
Paul

[It's-Never-too-rough]

Originally Posted by Red-Leader

Looking around for a fast 25 + ft offshore boat and find it strange that most boats have been re-engined !
Why if these boats are so little used do they need to have new engines, or indeed so much spent on the engines for very little use.
Even the diesel versions of various ages seem to suffer with complete engine replacements.
You expect a lot more use from a road engine.

R-L

Road engines don't have salt water running through their exhaust systems!

Just about every inboard marine engine that I have replaced has been due to this in one way or another.

Outboards are lightweight and highly strung, especially 2 strokes. They don't like the sea air, long periods at maximum load and the constant load on/load off at high revs.

Unless you drive down motorways flat out with a fully laden trailer you don't come close to putting your road engine under as much stress.

[Red-Leader]

I take your point to some degree, but do they really have a hard life !
It seems anything over 10 years old has had either major engine work or new engines fitted. Surely diesel engines are made to run under load and would benifit from a constant speed.
I also had imagined that once on the plane the engine would be under a lot less stress.
Anyway thanks for your comments, and Ill keep looking.
Cheers
R-L