Can anyone tell me the size of the bilge blower on a Capri 26 with the Universal M2-12 Diesel? It's either 3" or 4" but I forgot to measure it and the boat is 700 miles away. I'd like to get a new blower to install on the next visit. A Catalina 27 would probably use the same blower... and yes, I use the blower to cool the engine compartment when underway.