I just purchased a 9.9 Merc 4 stroke. 84lbs. I have a 25hp Johnson on a 16 foot Aluminum Grumman Rogue 1990. I have a Garlick 4 stroke Kicker plate that weighs approx. 20lbs. Is this too much weight on the back of my boat. Was going to have the plate mounted on the transom but it seems awful heavy. Just a bit nervous.<br />Thanks