I have a 225 2 stroke Yamaha on my 23’ CC and it runs just fine like your 225 Merc. must have done on yours as well. I still have a lot of time left on my Yamaha but if I was going to replace I would just go up to 250 not a 300. I really don’t see any advantages in going up to 300 hp. I would probably do the E Tech. because of it’s weight. I also have the motor on the transom and like it that way, but a lot of guys love it on a bracket and say they ride even better “like a 25 footer” with one. If I were to go with a 300 I would have the bracket because of the extra weight.
FellowShip
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Just for the Grins