Has anyone had success using "over the hub" type prop on large Mercury 400/450 4-Stroke Sportmaster, single engine boat?


Seeing all the exhaust has to go through the lower unit and "over the hub" of the prop, will it cavitate too much to get up on plane?


Something like the old Mercury Pro ET, Mazco R.E.4, BBlades Blaster, Hill Bullet 4,........of course only newer ones rated for the larger 4-strokes.


I'm in the process of prop testing a newer heavier 22 Talon with single 400R 2.6L and currently using Max-5 with no issues.


A Cleaver doesn't plane well for sure.