I have a 1999 225 FICHT, When I trim up after getting on plane I speed up until I hit 3/4 trim and then it stops along with my speed. 63 GPS. I can trim full up and down at stop or out of the water. Is it a weak trim motor or possibly low on fluid? I think this is keeping me from getting to full top end speed. 21SS Extreme. Any info would be appreciated. Thanks