I just purchased a Bass boat with a Johnson VRO 40HP 2 stroke Model#J40ELCO,Serial#70151** and the prop is pretty banged up. Its 12X1/2 13 and i dont beleive its the original and i would prefer to replace it for better performance. I currenty max out a 4000 rpm full throttle and i'm a novice when it comes to boats as this is my very 1st. i'm alos intrestedin a way to keep the trolling motor battery recharged with some kind of charger so i'm able to stay out longer instead of the battery dying. any idea's would be great.