I’m in a similar situation. 1/2” plywood decking, two 27 series batteries(placed in front of middle bench), 3 gallon fuel tank, tackle and other crap, Lowe 1467UV, 2013 Tohatsu 9.8hp, 4 stroke carb. 17mph gps.
Engine was 3-4” under keel, I raised it, actually put it a little above keel, speed...