I've finished restoring my 24' 1987 Sweetwater pontoon boat. On it I have a 2001 mercury 115 hp, elpto outboard with a SS Mercury Laser 2 prop. Numbers on the prop are 48-16990 20p. Currently fully loaded with 9 adults and 4 small kids, 35 gallons of fuel and gear it runs WOT 18-19 mph on gps...