[rockdoc]

Doug,

I've rigged my I/O blowers on the inside of the transom, the blower inlet attached to flex tubing going down to almost the bottom of the bilge, under the motor, with the outlet of the blower attached to flex tubing going up to the duct up on the transom cap. On the Seafari, there are two of these ducts, and the one facing aft is the one I used for this. My understanding is that the blower pulls fumes out of the bilge, so I have set them up this way. (as oppposed to setting it up so the blower actually blows INTO the bilge). I like the two ducts up on the transom cap setup, as once underway, the forward facing duct is forcing fresh air into the engine compartment, and thia forces bilge air out through the blower and out the aft facing duct. (even though the blower isn't on). Neither of my boats has any of those side vents. To me the primary importance of the blower setup is to pull bad air and any fumes out before firing up the engine.

rockdoc