Buddy of mine has a 2.5 EFI 225HP mariner that somehow sheared a couple lower unit studs, broke the mid casting and busted the driveshaft.

We have another lower for it, and I've got a pile of 2.4 fishing midsections.

The mids look the same, except for instead of the 2 big rectangle exhaust holes up top, the promax has 2 small round holes drilled on each side, and a big round port on one side with a rubber boot that steps over to the middle to exit the skirt.

It appears that the 2.5 has a 2 piece adapter on it, but there is a water fitting near the rearmost bolt that the 2.4 adapters don't seem to have.

What do I need to do to use one of my 2.4 mids on this thing?