You know guys, I know I'm going to catch hell on this one, But..ITS A SAILBOAT..With a note on SAIL... If you dont like the way the motor works, put the sails up.....and if you find you're spending more time motoring and less time sailing, maybe its time to go over to the DARK SIDE.......
I don't know where you live, but in the PN, we can get weeks and weeks of no/little wind in the summer. Often the best weather to be out on the water it's very still. Wind or not I'm gonna be out there. I would obviously prefer to sail, but sometimes the wind doesn't co-operate. We also have to deal with tons of shoals and reefs, very high currents, and crazy tides, and I'm glad I've got the iron jenny as backup.
Sometimes you just can't count on nature.
I dunno about your engine, but the westerbeke bolt-on components have a less than stellar rep. It is a basic system and you would think it would be reliable, but I've had to rebuild my jabsco saltwater pump 3X since I bought this crazy boat. And there have been several posts on the CSOA website with people having problems with the heat exchanger system.
I think it can be simpler, that's all. I just wonder if anyone has tried conducting the excess heat through the hull. Obviously a steel boat would be better to test this, but I don't think it's a requirement. When I get some time I would like to look at the numbers further.