Description
Mercury 150L FourStroke (11500104A) — 150 HP Outboard Motor
The Mercury Marine 150L FourStroke (model 11500104A) delivers proven reliability and efficient power in a compact, serviceable package. With a 3.0L inline 4-cylinder SOHC design, computer-controlled multi-port EFI, and SmartCraft Engine Guardian protection, this 150 HP outboard is built for clean running, confident control, and low-maintenance ownership. Ideal for aluminum deep-V, bay boats, pontoons, and multi-species rigs that need strong mid-range torque and a wide 5,000–5,800 RPM operating band.
Why Choose the Mercury 150L FourStroke (11500104A)
- 3.0L Displacement, Inline-4 SOHC: Big-block torque in a lighter, compact footprint for quick planing and confident mid-range.
- EFI Efficiency: Computer-controlled multi-port electronic fuel injection (EFI) optimizes cold starts, throttle response, and fuel economy.
- SmartCraft Engine Guardian: Continuous monitoring helps protect your investment by alerting to critical parameters.
- Power Tilt & Trim: Dial in running attitude for speed, efficiency, and comfort across varying loads and water conditions.
- High-Output Charging: 60A/756W belt-driven alternator supports today’s graphs, pumps, lighting, and accessories.
- Everyday Fuel & Easy Service: Runs on 87-octane unleaded; designed for straightforward maintenance and long service intervals.
- SmartCraft Compatible: Integrates with Mercury SmartCraft instrumentation for clear engine data and diagnostics.
Engine Specifications
| Manufacturer | Mercury Marine |
|---|---|
| Model | 150L FourStroke (11500104A) |
| Horsepower / kW | 150 HP / 110 kW |
| Engine Type | Inline 4 |
| Valve Train | 8-valve Single Overhead Cam (SOHC) |
| Displacement | 3.0 L |
| Ignition | SmartCraft ECM 70 Digital Inductive |
| Fuel Induction | Computer-Controlled Multi-Port EFI |
| Full-Throttle RPM | 5,000–5,800 RPM |
| Cooling | Water-cooled with thermostat |
| Dry Weight | 455 lbs |
| Recommended Fuel | Unleaded 87 Octane (minimum) |
| Recommended Oil | Mercury FourStroke 10W-30 |
Operational Details
| Starting | Electric (turn-key) / Smart Start Electric |
|---|---|
| Controls | Mechanical throttle & shift |
| Steering | Big Tiller compatible |
| Trim System | Power Trim |
| Tilt System | Power Tilt |
| Gear Ratio | 1.92:1 |
| Gear Shift | F-N-R |
| Alternator | 60 amp / 756 watt (belt-driven) |
| SmartCraft | Compatible; Engine Guardian protection |
Fuel, Oil & Compatibility Notes
- Fuel: Use unleaded gasoline with a minimum posted octane of 87.
- Oil: Mercury FourStroke 10W-30 (follow Mercury’s service schedule and climate guidance).
- Rigging: Mechanical throttle/shift; compatible with Big Tiller steering and SmartCraft digital instrumentation.
- Prop Selection: Match pitch and diameter to boat type, load, elevation, and WOT target RPM (5,000–5,800). Verify hub kit/prop family for your gearcase.
- Fitment Check: Always verify model/serial, transom height, gearcase, and rigging components with official Mercury documentation before purchase.
Get Pricing, Rigging, and Availability
Contact our certified team for current pricing, lead times, propeller recommendations, and complete rigging packages for the Mercury 150L FourStroke (11500104A).
Frequently Asked Questions
What boats pair well with the Mercury 150L FourStroke?
This 150 HP, 3.0L inline-4 is a favorite for aluminum deep-V multispecies boats, bay boats, center consoles, and pontoons where mid-range punch, efficiency, and reliability are priorities.
What is the recommended WOT RPM range?
The factory wide-open throttle operating range is 5,000–5,800 RPM. Choose prop pitch to land in the upper half of that range with your typical load.
Does it support SmartCraft gauges?
Yes. The engine is SmartCraft compatible and includes Engine Guardian protection. Ask us about compatible displays and harnessing.
What fuel and oil should I use?
Use unleaded 87-octane (minimum) gasoline and Mercury FourStroke 10W-30 oil, following Mercury’s maintenance intervals and local climate guidance.
What is the alternator output?
The belt-driven alternator provides 60 amps / 756 watts to support today’s electronics and accessories.
Is this the same as model number 11500104A?
Yes. Model 11500104A corresponds to the Mercury 150L FourStroke configuration described on this page (same engine, different color).