My prop is marked 13.75 x 15 and as far as I know came with the 90 hp, 2001 Mercury when new. I recently bought the boat and motor and at WOT the tach reads 5400 rpm (spec is 5000 to 5500)and GPS reads 39.1 mph (speedo says 40). Total weight is about 1900 pounds, gear ratio is 2.3:1. The boat...
