I have a 2008 ZX 200 with a HPDI 200 that required a replacement of my 12" jackplate due to one of the ears breaking. Had the same model Slidemaster manual jackplate installed and now the boat porpoises bad on midrange rpms.
PTP was at 4.0", moved to 3.50" and had issues getting on plane. Moved to 3.75" and comes out of the hole better but still porpoises at 3500-4500 rpm's.
I had Croxton B&B the prop (25 Temptest Plus) and tried my spare 4 blade Fury 24 with the same result.
Any ideas as the porpoise issue was not as much a problem before the jackplate replacement.
Thanks,
Skeeterman70