The results of the Nissan 3.5hp outboard on a Mac21: We took the first voyage in our Mac21 yesterday. It was also the first voyage of our new Nissan outboard. We went to a local reservoir to meet up with a group of boat fanatics (a "messabout" in boat fanatic nomenclature), but since we drew too much water with the keel, we had to launch about 4 miles away and motor up. Speed with two adults and gear aboard (about 500 lb): 4.4 kt @ 3/4 throttle, keel up 4.0 kt @ 1/2 throttle, keel up 4.1 kt @ 3/4 throttle, keel down, 5 kt headwind 4.3 kt @ 3/4 throttle, keel down, no wind 4.4 kt @ 3/4 throttle, keel down, 3 kt tailwind Speed was unaffected by adding a third person. This was all towing a Puddle Duck Racer as a dinghy http://www.pdracer.com The engine is one of the ones that you have to spin 180 degrees to get reverse, which I thought would be a pain. However, it works well as a stern thruster for docking when it's turned 90 degrees, and it has neutral, so I can take it out of gear if I want. All in all, a successful outing. There was only about 30 minutes of wind, but that's ok; we had fun anyway. Happy Sailing Greg