The 25 will balance much better with 1 engine, important in that hull. I don't think it will be very fast with the 250, depends on what you need. I run mine with a 5.7 v8 I/O duoprop that is around 290 hp. Most efficient cruise is around 25-26 knots with a moderate to light load, but it drops fast when you load the boat down. With another 1000 lbs loaded for a Bahamas trip, 21-22 knots is most efficient cruise(7-8 inch vacuum and I don't want to run any harder)
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Torque will be a significant issue. 2 stroke outboards often don't have near as much torque as I/Os of the same horsepower. It makes a huge difference if its real sloppy and you want to slow way down. A very deep hull like this one takes a lot of torque to stay on plane when going slow.
Just my opinion, but I'd stay with a single I/O in that hull, much better balance and CG, plus no torque issues.
During your rehab, check the stringers carefully underneath the bunks. Consider adding a bulkhead forward.
Connor
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