when i go to start my boat....1986 starcraft islander 3.0 liter..... i turn the key and sometimes she doenst turn right over... i mean nothing not a click or anything but after turning the key back two or three times she takes right off like normal...... i was wondering if it was maybe a weak cell in the battery? maybe this doesnt have anything to do with it BUT my downriggers seem to be coming up very SLOWLY all of a sudden... IDK any input would be helpful guys thanks in advance