Battery Question. Trolling motor

Well seems that after 4 years it's time to replace the trolling motor
battery. It's been abused. Dunked in ten feet of water, left out all
winter( I thought it was in the shed). It's time here has expired. On full
charge I get about 3 good hours out of it. I use to be able to make two
morning trips without any loss of power, after 2 + hours this morning I was
trolling back very slowly. I use a 48 pound thrust Minn Kota for the 12 foot
Rubber Lipped Mudsucker. Any suggestions on getting a replacement? I am
using an everstart deep cycle trolling motor and I am tempted to get another
one but local Wally World doesn't carry them anymore. I'll keep this one as
a back up and fix the small 30 lb thrust motor I have and use it on the
front in conjunction with the 48 pound one mounted on the rear.


I also need to find a place that sells replacement parts for Minn Kota
trolling motors. I definetly want a replacement prop pin as snapping off the
last one really sucked. I would like to just be able to replace the pin
should it happen again. There are a few other things I would like to get as
well. Any Ideas?