Having shifting problems with our boat. Problems started at the end of last year. Shifting into reverse is fine. Shifting into forward clunks and grinds. The throttle handle needs to go quite a way forward to get it to engage. By then it is revving higher causing the clink and grind to be worse. I have taken the shifter cable off the linkage and moved it on and out and it seems to engage forward reverse and neutral just fine. I did no adjusting last year to cause anything. I took the Gen II model 4000 shifter apart to see if anything was obvious but no? Any thoughts ? Dan