#Model-90elpt Type-Standard. Whether your day calls for a vacation or a voyage, a Mercury 75 to 150hp FourStroke outboard is the perfect accessory for your next adventure. They feature efficient, lightweight designs that ensure no power goes wasted - the ideal way to get wherever you want to explore next.. Mercury 90HP at a glance: a 2.1L EFI four-stroke with 35-amp charging, available in 20"/25" shafts and Standard or Command Thrust (CT) gearcases. Pick CT for heavier hulls/larger props and bet