... EFI Outboard Motor Price $4,739 Description : Mercury 90 hp Four Stroke. Long shaft. Electric start. Power trim & ... . Perfect for a pontoon boat, fishing boat, or speed boat. Mercury FourStrokes have long led the pack in clean, quiet, fuel ... , responsive performance - all while cutting your fuel and maintenance costs. Engine : Engine Type 4 (inline), Horsepower 90 hp (67 kW) at prop ...