On the PDQ 34 powercat, one of the best little cruising powerboats of all time, I think one of the biggest design flaws is the location of the vent for the engine compartments. While running in some sea states, water can come up the transom steps and into the vent, sloshing salt water into the engine compartment. I cruise my boat in Caribbean waters and sometimes get caught out in bigger wave conditions than I would like. I'm seriously considering glassing over the transom step vent and installing two 3" diameter vents for each engine compartment on each side of the aft window hatches behind the queen births. One vent would be attached to a blower. I'll make ductwork to run the ventilation from the vent to the engine compartments. Of course I'll have to cut four 3" holes (two in each cabin) into the shelf aft of the queen births in the aft cabins to run ductwork. This will provide both an ingress and egress for ventilation air for the engines and in my opinion make the boat much safer in open water.
Can someone out there tell me why this is a bad idea?
Hull #27 currently in Guatemala