Hi guys my 64 merc shifter is all funky and I can’t find it in the Manual. It won’t lock in park I disassembled it and it looks like there are 2 springs in the knob that are supposed to keep the detent in place. Should I try and fix this or just replace it with an after market shifter? I have read all the posts how this shifter and neutral safety switch were sub par at best when new. Thoughts? Ideas?