Does anybody know what the light blue expandable air intake hose is? My hose is split into several pieces, and it no longer vents/intakes air from outside. The portion of the hose remaining just circles around in the engine compartment and doesn't exit to outside.

I also need to get some cowls for the vent hose. I still have the locations for the cowl vents but both are blanked off. Does anybody know which cowl vents to use? I would prefer to use the existing through-hull fitting.

There is an old thread on this that has the answers for you.

Thank you. I will get some of those cowl vents ordered.

For the intake hose, I am contemplating using a standard RV sewer hose. I think that will be approximately the same size ( about 3" ID? ) and will be flexible enough. I just need to get it to attach to the dorade vents and to the intake, which should be simple with a few hose clamps.

I used the accordian style dryer vent hose from Home Depot and it worked fine.