Probably. I know the carb is different. The crankcase, exhaust tube and intake manifold part numbers appear to be the same. Go over to marineengine.com and pop up the 25 and 35hp diagrams and compare.
If you have not already seen the thread at the link below, take some time to read through it. I think it is very informative. Come back and post what you decide to do. Good luck!
