In my case, if I change to the newer 2YM15,
But, if I am going to repower, It may be worth the extra $1100 engine cost, as well as a new / used prop / shaft, to get the added HP of the new 3YM20.
I am in the process of finding out which engine would be best for my Halcyon Clipper 27 (*)
You write having changed engine to a Yanmar 2YM15.
You also write considering a 3YM20.
It appears to me there are in this discussion 3 (Yanmar) engines in the running:
2YM15 (14pk) à EUR 6060,-
3YM20 (21pk) à EUR 6950,-
3YM30 (29pk) à EUR 7990,-
(Prices incl. sales tax; April 2009)
What are the dimentions of your ship Northeaster?
The original engine of my boat was a Sabb 8hp. The max HP suited to the boat has been figured out as being about 12HP. A logical conclusion would thus be that the 2YM15 is the best match, at least mathematically. I like to make my boat ready for any waters: ocean as well as long trips upstream rivers. Having this in mind: will the 2hp over-powered engine be 'enough' to avoid to run the engine at all time at full power/noice? Maybe the overpowered 3YM20 never will be able to deliver its full potential but grant benefits one will have to miss with a 'right seize engine'?
Thank you for contributing to this forum. I would be most grateful if you could share your views regarding this subject with us.
(*) My boat type: Halcyon Clipper 27
LOA: 8.23m (27'0")
Displacement: 3048kg (6800 lbs)
Original engine: SABB 8hp