Originally Posted by pokeyminger
The transom has I believe been cut down by about 2inches and when I used the boat 4 up with adults last week I had quite a bit of water coming over transom when on the plane.
The engine anti cavitation plate is just about level with flat bottom of hull with engine trimmed all the way in.
I was wondering if You SR4 experts would advise I build transom back up to original height to stop wash whilst on plane splashing over and into stern of boat?
Ventilation plate "about even"? Does that mean even, slightly above, or slightly below the level of the hull?
If it's slightly below, I'd guess you might be able to rebuild the transom at least somewhat, and raise the motor height to get the ventilation plate a tad above the hull (though I'm also not familiar with the hull's general characteristics. More on experimentation below.) If it is already slightly above, then you are likely stuck with it there (do a search for "splashing off the [lower unit] [motor] [leg]" and you may find some ideas to mitigate the water.)
Best bet would be to raise the motor by a bolt hole or two and see how high you can go before prop ventilation becomes a problem. That will give you a rough idea of where you can go.