Don't know if anyone has experienced this or has an answer.My 96 GTX, 787 engine will sputter and not pick up speed or RPMs for anywhere from 10 to 15 min when first in the water. Feels like a bad miss or almost like running on one cylinder. After about 10 or 15 minutes of slowly giving it gas (and a lot of patience) it will take off and run fine. Might sputter a time or two but for the most part runs fine. At full throttle I'm getting about 45mph at just under 7000 RPMs, not sure if that is where it should be or not. Any input would be greatly appreciated. Thanks