I know this is a dumb question, but I'm tearing out what's left of my hair over this and would really appreciate some advice.
I running a Mark 55 type lower unit with the cav plate 1/2 " below the bottom of the boat (a deep vee design with an 8 " wide step). My totally stock (and rare) 15 pitch bronze two blade bites fine--no trouble--but my 17 pitch bronze two blade cavitates its butt off! Same set up! The blades of both props are in perfect condition, the ODs of the hubs are similar, and the props are on the propshaft the same physical way (no gaps at the housing).
Has anyone an idea why the 17 won't hold? It bites fine until the power comes on then suddenly goes berserk! If I nurse the boat onto plane (by literally sitting on the bow with only part throttle), I can eventually get the boat planed off. The prop then grabs fine--unless I stupidly allow the boat to drop off plane.
Jeff
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