Just acquired an old Hysucat 6.5 and want to know the location of the cavitation plates on twin outboards in relation to the rear stabiliser foils or bottom of hulls. The boat has had some work done on transom so not sure that the motor are located at correct height.
We are getting a lot of ventilation or cavitation. The boat has twin 50 outboards. Also best prop size if anyone knows.
I can't be sure if mine are at the right height, but they generally work fine in this position. I do find I need to trim all the way down for maximum acceleration, otherwise the 'grip' can be poor, though with care it's still possible to get up to speed with the engines trimmed up somewhat. I certainly find the engine trim is very important in getting the right hull/foil position
-phil
