Stronger. Lighter. More Durable. Massive displacement and the lightest 150 hp four-stroke in its class Features Performance, Durability, Efficiency: Making 150 horsepower is easy for this 3.0-liter, four-cylinder, single-overhead-cam engine. Its generous displacement lets it churn out power without breaking a sweat. You get exceptional durability and long-term peace of mind. Compact and Versatile: It’s the lightest 150hp four-stroke outboard on the market. Smart design makes the 150hp Mercury FourStroke nearly 20 pounds lighter than its closest four-stroke competitor, and less than a battery weight heavier than a two-stroke. Potential uses for this engine are endless, including bay boats, boats with poling platforms and pontoons with swim platforms. Propped to Perform: The Mercury Enertia® propeller is the perfect complement to the 150 FourStroke. Designed specifically for large four-stroke outboards with a revolutionary low-diameter/high-blade-area design and cast with the Mercury proprietary X7® propeller alloy, Enertia delivers phenomenal acceleration, top speed and durability. Easy to Maintain: Rather do it yourself? The no-spill oil-change system, an easy-access fuel filter and a lifetime maintenance-free valve train make the Mercury 150 FourStroke the easiest-to-maintain 150hp four-stroke on the market. Scan a QR code under the cowl to link with step-by-step video demonstrations. Perfect for Repower: The compact, lightweight design of the Mercury® 150hp FourStroke engine fits most transoms, including those with narrow engine wells and tight motor spacing. Rig it with mechanical or hydraulic steering, mechanical control and cable systems, and a full complement of analog or SmartCraft® gauges. Specifications HP / kW: 150 / 110 Engine type: Inline 4 Displacement (L): 3 Full throttle RPM: 5000-5800 Fuel induction system: Computer controlled Sequential Multi-Port Electronic Fuel Injection (EFI) Alternator amp / Watt: 60 amp / 756 watt (Belt-Driven) Recommended fuel: Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum Recommended oil: Mercury FourStroke Oil 10W-30 Engine protection operator warning system: SmartCraft Engine Guardian Compatible with SmartCraft digital technology: Yes Starting: Electric (turn-key) Steering: Big Tiller Compatible; Electro-Hydraulic Power Steering Optional on Duals; Hydraulic power steering; Mercury power steering; Remote Shaft length: 25 in. / 635 mm Gearcase ratio: 1.92:1 Dry Weight: 455 lb. / 206 kg Bore and stroke: 4.0 x 3.6 in. / 102 x 92 mm Ignition: SmartCraft ECM 70 Digital Inductive Fuel system: Electronic Fuel Injection (EFI) Cooling system: Water-cooled with thermostat Gear shift: F-N-R Gearcase options: Standard Trim system: Power trim and tilt with SmartCraft programmable tilt Counter rotation: Available Color: Phantom Black NOTES: Dry Weight based on lightest model available.