Mercury 150 HP SeaPro EFI 2016–2020 Service Repair Manual – PDF Download

🛠️ Mercury 150 HP SeaPro EFI 2016–2020 Service Repair Manual – PDF Download

🧰 OEM Factory Workshop Manual – Covers Mercury 150 HP SeaPro 3.0L EFI FourStroke Outboard Engines (Serial No. 1B905505 and up)
📲 Instant PDF Download – Works on Windows, macOS, iOS, Android, and Linux
🔧 Trusted by commercial operators, marine technicians, and Mercury service centers worldwide

🔍 Model Background

The Mercury 150 HP SeaPro EFI outboard (2016–2020) was engineered specifically for commercial-duty applications, offering a rugged and long-lasting solution for workboats, patrol vessels, and high-hour operators. Based on Mercury’s popular 3.0L inline-4 EFI platform, the SeaPro variant was built with reinforced components, upgraded mounts, and a commercial-grade calibration to handle extended use in harsh conditions.

This model featured a conventional Electronic Fuel Injection (EFI) system rather than more complex direct injection or turbocharging, which helped enhance reliability and ease of maintenance. With mechanical throttle and shift controls, it was ideal for repowers and rugged marine environments where simplicity was preferred over digital integration.

Durability enhancements included a heavy-duty gearcase, corrosion-resistant coatings, and upgraded internal parts designed to outlast recreational models by thousands of hours. Known for its low fuel consumption, easy serviceability, and reliable cold starts, the 150 SeaPro EFI remains a popular choice in the commercial marine world and is still supported with a wide range of parts and dealer service options.

📆 Model Years Covered:

• Mercury 150 HP SeaPro EFI – 2016
• Mercury 150 HP SeaPro EFI – 2017
• Mercury 150 HP SeaPro EFI – 2018
• Mercury 150 HP SeaPro EFI – 2019
• Mercury 150 HP SeaPro EFI – 2020

📘 Manual Details:

• Model: Mercury SeaPro 150 HP EFI 4-Stroke (3.0 Liter)
• Serial Numbers: 1B905505 and above
• Document Type: OEM Service & Repair Manual
• Language: English
• Publisher: Mercury Marine
• Pages: 700+ with detailed diagnostics, diagrams, and procedures

📚 Manual Sections Include:

• General Information & Specifications
• Ignition & Charging System
• Switch boxes, stators, timing adjustment
• Fuel System
• Electronic Fuel Injection (EFI), fuel pump, primer bulb, link & sync
• Powerhead
• Cylinder block, pistons, crankshaft, gaskets
• Cooling System
• Thermostat, impeller, water passages
• Midsection & Power Trim
• Tilt system, mounts, bushings
• Gearcase Assembly
• Propshaft, seals, shimming, water pickup
• Control Linkage & Adjustment
• Shift/throttle linkage, idle stop
• Wiring Diagrams
• Full schematics with color and component references

💾 Format & Compatibility:

• File Format: PDF
• Searchable & Bookmarked: ✅ Yes
• Printable: ✅ Yes – Entire manual or specific chapters
• Compatible With: Windows, macOS, iOS, Android, Linux
• Delivery: 📩 Instant Digital Download

🔍 Keywords:

Mercury 150 HP SeaPro EFI service manual PDF, 2016–2020 outboard repair, 3.0L four-stroke, gearcase, fuel system, wiring diagrams, marine engine diagnostics

❓ Mini FAQ:

Q: Is this the official Mercury SeaPro repair manual?
A: Yes – it’s the complete OEM factory-issued manual used by commercial and service professionals.

Q: Does this manual include wiring and EFI schematics?
A: Absolutely – detailed diagrams are included for all electrical and fuel systems.

Q: Can I use this file on mobile devices?
A: Yes – the PDF is searchable, indexed, and fully compatible with tablets and smartphones.

🧭 Helpful Resources for Mercury Outboard Owners

• Why Every Mercury Mariner Owner Needs a Service Manual for At-Home Repairs – Learn how a digital service manual can save you time and money on common DIY maintenance tasks.
• Outboard Engine Troubleshooter – Not sure what’s wrong with your engine? Our free troubleshooting guide covers common issues across Mercury Outboards and more.

🔧 Browse More Mercury Manuals

Note: While our manuals are designed for DIY use, they do not replace professional mechanical training. If you're unsure about a repair or your engine shows serious issues, we strongly recommend visiting a certified marine mechanic. These guides are best suited for owners with basic to moderate mechanical experience.