After sailing 3500 miles from Kiel, Germany to Lofoten, Norway and back with a Vindö 40 with a 10 kW inboard engine, I can only say: it works perfectly!

In my Tartan 33, I installed and operated a 10kw direct drive and travelled over 2,000 miles over two years with it. One trip was 700 miles. The direct drive is extremely quiet and with the right propeller the air cooled motor simply does not overheat.