1982 Bertram 38 Convertible – Engine Raw Water Thru Hull Location

Hi Everyone,

I am working on the cooling system for this boat’s 6BTAs and doing it the “seaboard” way.   I’d like to make some space when you enter the engine room and attached is a pic showing the location of current 2.5″ strainers and also newer 2″ strainers further forward.  The third picture shows where the new 2″ thru hull might go.  I don’t have a picture showing axial position of the thru hulls right now, but they are approximately middle of the engines.

Question to this group, would moving the thru-hulls forward ~18″ be significant enough to draw air into the system while on plane?

The boat currently also has “scoops” on the 2.5″ thru hulls, I was going to go with just basic mushroom thru hull.

Appreciate any thoughts you all have.

Zac