I bought a new 16 foot jon and it came with an 83 evinrude. It runs good, but when I rev it up it tries to plane then slows down and while the engine is reving. I think this is cavitation. A friend told me it sounded like my prop was not low enough.

It is a tall transom- 20-21 inches and a long shaft motor. However, the cavitation plate is about 3 inches above the botom of the boat.

Is this cavitation? Can you buy a plate or something for this. The boat motor will not go down any further on the transom. OR am I going to have to buy another (newer) motor wife will not like that.

Buuuuuuuud