It'll go in to reverse on the muffs in the yard but not when I put it in the water and try and reverse. It just grinds. Any help or info would be greatly appreciated
it would help folks if you indicated which 800 stringer you have. electric shift, hydro mechanical or pure mechanical.
as I replied to your PM, guessing you have a pure mechanical. may be able to get a bit of adjustment, however most likely the lower shift cable is stretched.