Noise = problem. Fixed mine
1. you have a blower - that's a good thing and you should be able to use it without having to talk over it. Its simply a turbine fan, but a heavy duty one moving at hi RPM, so its going to humm a bit more than your bedroom fan.2. you should hear a mild humm only. anything else and there's a problem that can lead to other problems if not fixed3. test: first, torque the 4 mounting screws to make sure they are tight. then, turn it on and if the noise persists, reach up and grab the plastic blower casing in several places, firmly, in an effort dampen any vibration, if that's even the source of the noise. if this doesn't help, or else just changes the noise slightly, then your mounts are probably fine and you have another problem.4. most likely cause: the turbine is rubbing where it ought not to causing un-necessary friction which could eventually cause the blower motor to fail from overstress. fix: remove the blower, disassemble the turbine housing, and inspect for areas of unusual wear. There are plastic parts in there that will eventually melt from the friction and gum up, dry once turned off again, and lock up the turbine should you try to turn it on again next boat trip. Use washers of correct size to offset the turbine from the casing so it spin free and clear. Clean up/sand any lumped plastic so that it doesn't make things worse.This is not fun as the blower is in a tight spot, but its certainly do able for the everyday do it yourselfer.have fun!brian