On my Classic I went from a 2.5 liter 200 efi mercury to a 3.0 liter efi beast. The 2.5 liter was a great motor. I had a 25″ trophy on it and it was the best all around prop for that motor. The 25″ trophy will work fine on your 200 optimax. It might be a little small and you may be in the rev limiter but I can tell you that it will perform great. You will have a much larger range of propellers you can turn with the 3.0 liter Opti than with the small block efi. I settled in on a 26″ fury for best all around performance on the 3 liter. It wasnt the fastest, or the slowest but had the best all around from hole shot to mid range to top end. I would guess your trophy will have a great hole shot and you will see 72-74 mph from it before you hit the limiter if you play with the set up a little. You will love the upgrade to the Optimax. You will now have a better chance to realise what the boat is capable of. The 2.5 liter efis were great motors just not enough tourque on the low end to reach full potential. Congrats on your upgrade. You will not regret it.Chris CoupelPaulina, La.Chris CoupelPaulina, La.