if i change from a imco upper and lower to a imco scx or bmax will my x dimension change? my current prop height is perfect, if i upgrade to the imco scx or bmax, with bigger gears, will it effect the depth that the prop is in the water? from what i understand the the two new drives are slightly longer in overall length (bigger gears) and with the back of boat at a angle that would put the prop deeper in the water. i wonder i this i why some people loose a couple of mph when upgrading drives?

Bmax is the same length as a Bravo drive.

ok so the bmax is exactly the same length from transom to back of drive? i am almost positive that the scx is slightly longer front to back which with the angle of transom would put prop shaft slightly deeper in the water. wish i could find specific dimensions on all three to compare. i read on these forums the scx was longer (slightly) because of larger diameter gears. is this

Waconda knows. He is the Bravo Shop.

IMO, even if they do push the drive back 1-2 inches because of the larger upper, I doubt it will move the actual propshaft down more than 1/8-1/4"

I would call waconda/John at The Bravo Shop to discuss it.

From the helmet face to center of vert shaft is 3.750 and from input shaft to prop shaft is 21 3/4. Hope this helps!