I'm making some modifications to my Bravo upper in order to accommodate a -3 lower. To get the prop clearance I had to chop off the rear snout of the drive just past the trim rams. I have acquired a Merc cavitation plate from a Bravo3 that I plan to fit and have welded in place.

My question is... How far back should/can the cavitation plate extend over the prop?

I've already cut off a large piece and if I were to weld today, the cavitation plate would extend about 4-5" past the prop. Very similar to the length of the plate on a stock Bravo3.

Would the length aid in planing and/or hurt performance once on top?

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updated with link to pictures - ttt

ttt

job 98% complete. Forgot about this thread and started another

i would close up the top as well, dont want air or water to cause any cavitation. looks great though!

It stays as it is. Have to feather it a bit to get on top but no real issues. Seems to work real well.

griswald, your doing one hell of a job, did you try it before and after? i bet that thing throws one hell of a roostertail without the plate.

I did, and there's really no difference before vs after but it will throw a bit of water in the air at cruise speed.