My 96 28 has a notched transom and I have a 3 inch spacer in the drive. Anyone else have a notched 28 and what are you running for a drive , motor and prop combo. My friend's 03 doesn't have a notch but his x dimension is considerably lower than mine..... input?

Guy by the name of b-stubb had the same boat with some wild running gear.

Hey man I posted a message on your extension box post about contacting b-stubb. Send him a pm and im sure he will get back with you in a few days. He had a 28 pantera single blower motor with ext box and imco drive or some kind of bravo style drive hopped up. He was get some high mph numbers if im not mistaken. I just talked to him a few weeks ago so he is around somewhere just send him a pm

search his old posts and you can find plenty

just did some looking quick... his boat was sick!!!!!. ive got to do some research and playing over the winter with mine. see if i can squeeze a little more out of her. any tricks?? feel free to give up some secrets

The X dim on standard pleasure(500-600hp) 28's is 17-17.5". The X dim on your(my old) boat is 20-20.5" from what I could measure. Jo told me it was set at 20".
It really depends on how much HP you put to it. The more HP you add, the more thrust you have to carry the bow and the more you can reduce the spacer.

That is correct Griff.

On the newer 28' SR version with the T.S. bottom and notch the drive heights are a bit higher than before.

JO

Jo Talked To Your Dad This Morning. He Said To Try A 1 Inch Or Take It Out Completely And See How It Likes It. I Have A Spare Drive With Out A Spacer So Im Gonna Try It This Week. If I Gan Gain Some Mph I Might Drag It To Cumberland Next Weekend For The Run!! I Will Keep Ya Posted

The boat will not run as well with out the 3" spacer. Also if you are going try it w/o the spacer keep on eye on the engine temp gauge. Maybe you can try a 5 blade prop with a 1" or 2" spacer.

JO

Changed the drive tonight . Definitely needs some spacer. Didn't carry the bow at all. Didn't gain any speed. Can over rev a bravo 4 blade 26 and a labbed 26. Could not get on plane with a 27 3 blade. Im guessing i need to try a 1 or 2 inch spacer. What is the trick to reducing prop slip? on the merc prop slip calculator im looking at 29% prop slip!!! I really don't want to spend a ton of money on spacers and props guessing... griff i took a measurement tonight and the x dimension is 20ish like you said. maybe my next step will have to be a huffer on top of the 548... jo how much for a raised blower hatch???