Where will you be placing the Genny? Out on the bow, on on the swim platform? IF you're going to place the Yamaha on the swim platform, that either has the outlets up against the transom, or you're aiming the exhaust pipe toward the walkthrough. Out on the bow isn't a great idea, if the bow is in the wind, exhaust gets pumped into the cabin hatches and straight through the cockpit. I know pletny of people do though. Just a couple of thoughts.
BTW- I like honda