OK, 1999 Cougar w/merc 250efi long shaft and CMC 5″ M/Jack plate running tempest plus 25P. Please give me some advice! This set up will chine hard around 65 MPH. I have reached speeds of 70.9 gps in rough water four batteries, full tank and tourey load but smooth water would be committing suicide. I have driven and owned a few other brand boats that did not have a major chine issue. The jack has maybe a 1/2 more lift. Remember this is a saltwater series motor with a 25″ mid-section. Do I change props, go with 10″ jack plate, change midsection with 3.0 liter 20″. Help me.Mr J
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