inline blower question

[brad minda]

I plan on replacing the inline blower for the engine compartment. As I live 2 hours from the marina could anyone tell me the vent hose size. I think it is 3" but I am not sure. Thanks

 

[shemandr]

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Looks like it could be 3" or 4".

 

[Project_Mayhem]

I'd try calling Catalina Direct or Catalina for a fast answer. Otherwise, there's a C30 group available at groups.io

 

[Dave R.]

I would guess 3”.
4” is the dryer size hose for a house.

 

[jssailem]

plan on replacing the inline blower for the engine compartment.

This task, when you cannot measure your boat, could be approached based on the blower output hose attachment diameter. If the blower is 3”s then it is likely the existing hose is 3”s.
Where are you going to vent the air outside the engine compartment?

If using a deck vent select a 3” vent. If the vent hole is larger than 3” than use a cover for the larger hole and cut a 3” hole in the cover plate. You can also use foam around a 3” hose to fill in and support a 3” hose in a larger diameter deck vent.