PS - re motor noise, air cooled or not - they all get noisy when you rev 'em up - if you have the 'notch' transom M17 but your motor is on a separate transom motor mount, behind the notch, you can cut the noise level in the cockpit a fair bit by shaping a piece of building insulation foam to fill the notch. One day motoring a couple years ago I propped a throw cushion up across the notch and got some noise reduction. So I took a scrap of 1.5" thick insulating foam (pink or blue or green mostly, depending on manufacturer) and shaped it to fill the notch and a few inches higher, with a groove to keep it from popping out fore/aft and snug push-fit into the notch. 2" would be better but I had some 1.5" at hand. I'll post a picture sometime soon when I get to doing a bit of maintenance on my boat. cheers, John -- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com