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Original price was: $8,000.00.$7,500.00Current price is: $7,500.00.
The Mercury 150HP FourStroke outboard is built for boaters who need strong mid-to-high-range power in a practical four-stroke package. With a 3.0-liter inline-four powerhead, electronic fuel injection, electric starting and a high-output charging system, this Mercury 150HP outboard is suited to fishing boats, family runabouts, center consoles and other vessels designed for 150 horsepower.
For buyers comparing Mercury 150HP outboard engines, the combination of displacement, torque, efficient fuel delivery and available digital control technology makes this engine a useful option for both new installations and repower projects. Exact shaft length, steering, controls, gearcase and rigging should be matched to the boat and the specific engine configuration being purchased.
| Specification | Mercury 150HP FourStroke |
|---|---|
| Rated power | 150 HP / 110 kW |
| Engine type | Four-stroke outboard |
| Configuration | Inline 4-cylinder |
| Displacement | 3.0 L |
| Full-throttle operating range | 5,000–5,800 RPM |
| Fuel system | Electronic Fuel Injection (EFI) |
| Alternator output | 60 A / 756 W |
| Starting | Electric start |
| Steering | Configuration-dependent; tiller and remote-steering options are available within the Mercury 150HP FourStroke family |
| Controls | Configuration-dependent mechanical or digital/SmartCraft-compatible rigging |
The 3.0-liter inline-four powerhead gives the Mercury 150HP FourStroke the displacement needed to produce useful torque across the operating range. That matters when a boat needs to accelerate onto plane with passengers, fishing equipment or other onboard load. The four-stroke design also provides the smooth power delivery expected from a modern recreational outboard.
Electronic Fuel Injection helps the engine meter fuel precisely across changing operating conditions. Mercury’s EFI system is designed to provide responsive starting, acceleration and efficient operation without the carbureted fuel system used on older outboards.
The 150HP FourStroke is equipped with a 60-amp high-output alternator. This gives the boat additional electrical capacity for batteries and onboard electronics such as navigation displays, sonar, radios, lighting and other marine equipment. Mercury also describes idle-charge battery-management technology for the 150HP model that can increase idle RPM when additional charging output is required.
A Mercury 150HP outboard can suit a broad range of boats engineered for this horsepower class. Typical applications include center-console fishing boats, aluminum fishing boats, bass and multispecies boats, runabouts and other recreational craft.
For a repower, horsepower alone should not determine compatibility. Confirm the boat manufacturer’s maximum rated horsepower, transom height, shaft length, engine weight, steering arrangement, control system, propeller requirements and available rigging space before purchasing or installing the engine.
Compatible Mercury FourStroke configurations can work with SmartCraft digital technologies for engine monitoring and vessel information. Depending on the exact rigging configuration, SmartCraft-compatible systems can provide information such as engine data, fuel information and other operating parameters through supported gauges or displays.
Marine engines operate in environments where salt, moisture and corrosion can affect exposed components. Mercury FourStroke engines use corrosion-prevention measures including durable coatings, advanced alloys, sealed electronics and a freshwater flushing system. Proper rinsing, inspection and scheduled maintenance remain important, particularly for engines used in saltwater.
The shaft length must match the boat’s transom and intended installation. An incorrect shaft length can affect propeller position, handling and engine performance, so the boat and existing installation should be measured before ordering.
Mercury 150HP FourStroke configurations can be supplied for different steering and control arrangements. Before purchase, confirm whether the boat requires mechanical steering, hydraulic steering, tiller operation, remote controls or compatible digital rigging.
Propeller selection should be based on the boat, load, hull design, intended use and the engine’s specified operating range. The correct propeller should allow the engine to reach its recommended full-throttle RPM range under normal operating conditions.
Regular maintenance is essential for dependable outboard performance. Follow the maintenance schedule applicable to the exact engine serial number and configuration. Routine service can include engine oil and filter service, gearcase lubricant inspection, fuel-system checks, spark-plug inspection, cooling-system checks, corrosion inspection and freshwater flushing where appropriate.
For a used Mercury 150HP outboard, buyers should also verify engine hours where available, service history, compression or leak-down results when appropriate, diagnostic information, lower-unit condition, propeller condition, steering components, electrical connections and signs of saltwater corrosion. A pre-purchase inspection by a qualified marine technician can help identify issues that are not obvious from a visual inspection.
When purchasing a Mercury 150HP outboard engine, confirm the exact configuration rather than relying only on the horsepower rating. Shaft length, steering system, control type, tiller or remote configuration, rigging, engine condition and included accessories can all affect compatibility and installation requirements.
If you are replacing an existing outboard, compare the existing engine’s mounting height, shaft length, steering system, controls and electrical connections with the Mercury configuration being considered. For a used engine, request service records and verify the engine’s serial number so the correct Mercury service information and parts can be identified.
Explore the Outboard Engines category to compare Mercury and other outboard options by horsepower, engine type and application. If you are unsure which configuration fits your boat, use the vessel’s manufacturer specifications and current engine installation measurements as the starting point.
The Mercury FourStroke model is rated at 150 horsepower, or approximately 110 kW.
The 150HP FourStroke uses a 3.0-liter inline-four powerhead.
The documented full-throttle operating range for the 150HP FourStroke is 5,000–5,800 RPM. Propeller selection and boat loading should allow the engine to operate within the manufacturer’s specified range.
Yes. The Mercury 150HP FourStroke uses Electronic Fuel Injection (EFI).
The 150HP FourStroke is specified with a 60-amp, 756-watt alternator, providing charging capacity for the boat’s electrical system and onboard equipment.
It can be suitable when the boat is rated and configured for 150 horsepower. Before repowering, verify the boat’s maximum horsepower rating, transom dimensions, shaft length, engine weight, steering, controls and rigging requirements.
Supported Mercury FourStroke configurations are compatible with SmartCraft digital technologies. Exact functionality depends on the engine configuration and installed gauges, displays and rigging.
Check the serial number, service history, engine hours if available, diagnostic records, compression or leak-down results where appropriate, lower unit, propeller, steering, electrical system and evidence of corrosion or previous damage. A marine technician’s inspection is recommended for a significant used-engine purchase.
