2003 Yamaha 150hp 4 stoke gear grinding

Hello to all, this motor is new to me and I was wondering if this is normal, the gear grinds when I shift into forward and reverse? Also a slight belt screeching/chirping noise, not all the time, can be heard, not necessarily when I'm engaging a gear. Thanks in advance!

[boats.net]

You have to shift into gear with a rapid motion, if shift into gear by slowly moving handle it will grind. May need to drop gearcase and grease drive shaft splines and seal area on shaft to see if noise stops.

I'll try it, thanks for your reply!