Yamaha 6hp shift issues

Dec 29, 2015
80
Beneteau 473 Mukilteo WA
I have a 2010 Yamaha 6 hp F6LMHA. Motor runs great but is difficult to shift. Both forward and reverse. I have change the oil in the bottom end and lubricated all the joints I can access from the top. I would love advice as to what avenue to take next.