mariner trolling motor question

[hooksetter62]

i have a mariner 21 lb thrust trolling motor,foot control. is there a kit or parts place to get some parts for it? the motor runs but very slow,i can feel and hear the bearings grinding. it needs new bearings. also is there a schmatic as to how it comes apart and how to reseal it. it dont look like to big a job. has no model number. ser #oc913450 whisper drive-stalker rl21. have not used it for a few years but you never know when you want to use it,just want to keep it ready for use. many thanks