MedDreamer
Active member
Run Andy Run........................................
A New Chapter - a new Marlow
- Thread starter Gludy
- Start date
MapisM
Well-known member
I'm not sure to have understood your doubts.
The basic logic is simple, though: engines choice should be driven by the required application.
A thousands miles passage isn't the typical pleasure boat usage, and requires the engine(s) to run continuously for days.
That is exactly the application higher rating engines are meant for.
If the boat requires 120hp at displacement speed/load, a single C7 A rated is probably just fine.
An E rated C18 would mean having a useless power reserve of 900hp...!?
What did the builder recommend on this subject?
I'm possibly radical with A rating, but using E rated engines for such a long range boat sounds a bit naive, either.
And as I said, there are other options in between.
The basic logic is simple, though: engines choice should be driven by the required application.
A thousands miles passage isn't the typical pleasure boat usage, and requires the engine(s) to run continuously for days.
That is exactly the application higher rating engines are meant for.
If the boat requires 120hp at displacement speed/load, a single C7 A rated is probably just fine.
An E rated C18 would mean having a useless power reserve of 900hp...!?
What did the builder recommend on this subject?
I'm possibly radical with A rating, but using E rated engines for such a long range boat sounds a bit naive, either.
And as I said, there are other options in between.
glenndraper
New member
Hi Paul, Nice to see that you have finally chosen your dream boat - I wish you all the very best with her!!!!
IMHO i would not fit a third unit - I would reduce the size of the units to say 700 man,s and be content to run at 650-700 rpm and enjoy the fugal fuel usage - if you have two units its unlikely that you would loose all power at the same time so safety isn't a problem. Anyway as said GOOD LUCK TO YOU. PM me with the latest on TC. - thanks Glenn
IMHO i would not fit a third unit - I would reduce the size of the units to say 700 man,s and be content to run at 650-700 rpm and enjoy the fugal fuel usage - if you have two units its unlikely that you would loose all power at the same time so safety isn't a problem. Anyway as said GOOD LUCK TO YOU. PM me with the latest on TC. - thanks Glenn
