the first ic above is of a 99 38. same bottom. 2" worked well on that boat.
you should really find out what your x-dimension is, and then make a decision. remember that going 2" shorter and adding a spacer is cheaper than buuying a 1" then finding out that you need to sell the 1 and buy a 2 or never finding out what a 2 could have done.
speed is not cheap. it takes time that costs money unless you can handle the tasks your self. and it takes parts that cost money, some of which can be a waste if not thought out properly.

26 Hydro's

monstaaa-Many thanks and I know the 1" dangers. I have the $ to do whatever, I just can't stand wasting it. Who can? I figured that with all of the experience in this forum, someone has the answer.
Many thanks again.

you are ver welcome, hopefully my comments have helped you come closer to a decision that best benefets you.

bets of luck and sasfe boating.

Just put on Imco 2"shortie's. They are well worth the money. Comes out of the hole good and gained good mph. Now I just got to get it proped right. Tried the 35p maximus's that fountain reccommend......but, couldn't spin enough rpm's for top end performance......They worked well out of the hole, in the mid-range, and had great fuel econo Just sent props back to merc. They said they get me some more rpm's out of them.

how many rpm's were you down?

I have 2 Mercury 2" shorties with 150 gears for 2500 ea or 4500 for the pair. Roger 336 214 6900

I was only turning 4800rpm's......Ron at Merc say's he'll get me some........... I can't wait to get'em back and try'em to see where I am at??? Plus I would like to learn what they are going to do to them......???

keep us posted

Last night second time I used with shorties.......one fell completly off going 60-65mph in 50ft of water....... I hope the place I had work on it satnds behind it!!!! My blood is boiling! To top it off the props I sent back to merc on Monday and pd $200 to overnight'em with ups still haven't made it there! Three days late so far! Not a good week!