i've got a nearly new power drive thats making some noise. i have the rubber feet between the deck and mount. do they get better once the brushes round off? i'm sure i'm getting tranfer noise to the water. its a hum at anything over 3. did a test saturday to see if the fish were hearing this thing. seem to catch more drifting over them than when the trolling motor was on. it could have been speed but i don't think so. any ideas on this or has anyone had same problem. thanks.