I have a Ranger Z20 with a 225 Evinrude HO and a manual JP. My issue is that once I trim up and am at speed, 50+, the boat pulls hard to the left. When I let off the throttle, it jerks right rather hard unless I lower the trim before letting off throttle. I'm unsure as to what might cause this. Aside from the pulling hard to the left at speed, it runs great and has zero other issues. Any input is much appreciated.