[McGillicuddy]

You've probably already resolved it but, hum and slow does sound like low hydraulic fluid, or low battery/bad contact. My last hum was low reservoir (re-filled). See any fluid or film around trim hoses that may suggest a hose, o-ring or fitting leak? Don't know yer motor so don't know about refill... What year models are your motor and trim motor? I think most of the late models have fill hole on port side near top of reservoir. Usually @ least a 1/4" screw or bolt.