I have a continuing problem with cavitation on a new 2017 20' Bennington with a 9.9 Mercury Pro Kicker...It and another nearby pontoon had bad cavitation issues so the dealer (Denny's Marina, in Indy) took the boat in to "rework the transom mount". They brought it back (with a new mystery battery draining short) and yet it still surges and lurches in the higher rpm range and is quite unpleasant to operate.
I understand cavitation well enough to know that it is probably from the interaction of the motor mount housing plate with the water but is the solution to raise even higher the plate or to go to a long shaft Merc? Or perhaps install one of those horizontal fin cavitation plates? Anyone with a similar problem who has solved the issues please let me know. It is turning my favorite evening activity- rounding the lake on my pontoon- into a frustration. Thanks in advance.
I understand cavitation well enough to know that it is probably from the interaction of the motor mount housing plate with the water but is the solution to raise even higher the plate or to go to a long shaft Merc? Or perhaps install one of those horizontal fin cavitation plates? Anyone with a similar problem who has solved the issues please let me know. It is turning my favorite evening activity- rounding the lake on my pontoon- into a frustration. Thanks in advance.