I guess I got lucky, 'cause I haven't had that problem. The only times I've ever porpoised, I had it trimmed obviously too high for the speed I was going. Trimmed down or added a little gas (didn't have to punch it) and all has been well. I have a 2014 ZX20, 250 SHO, manual jackplate set at factory setting. Sorry I don't have any solutions other than adjust trim or accelerate.