Why are you moving the exhaust from the stern to the side? Apart from
moving the fumes closer to the cockpit, waterback up when heeled becomes
more likely. You weren't making a lot of progress motoring in bad weather
on your trip. If you ever got trapped against a lee shore by strong winds,
motor sailing might be the only thing that got you off. You could also be
fighting enough wind that you were heeled nearly to sailing angles under
bare poles (been there, done that).

If water back up through the stern exhaust line is the motivation, you are
still going to need just as high a loop, or higher, with a side exhaust.

If you want to cut more holes in the hull at this point, I would add a
second water intake on the other side so you'll have the option of powering
heeled on each side without losing cooling. This can also important for
getting ungrounded as you learned. A second strainer in the alternate line
would really set you up.

BTW take a look at this picture.

http://www.justpickone.org/skip/gall...40&sta rt=126

Note the short tail on the knot and the lack of whipping. This knot is all
that keeps the jib from unrolling unless you go forward to put a tie on it
as you should when the boat is unattended. Imagine the chaos of your Genoa
going "WHUMPH" in the middle of your last adventure and having to then lower
it in the dark and stow it on deck. This knot should have a nice long tail
with a proper whipping, not burning, to provide a stiff end that will resist
pulling through. You can see that the soft end of this one is close to
being able to pop through under strain. I know the whipping may have
disappeared in excitement but it was just one tough night and you want to be
prepared for much more. Renew this knot often. These kinds of little
details often have big consequences.

--
Roger Long