Mercury 15 HP EFI 4-Stroke 2018–2023 Service Repair Manual – PDF Download

🛠️ Mercury 15 HP EFI 4-Stroke 2018–2023 Service Repair Manual – PDF Download

🧰 OEM Factory Workshop Manual – Covers Mercury 15 HP EFI Four Stroke Outboards (Manual ID: 90-8M0125265)
📲 Instant PDF Download – Works on Windows, macOS, iOS, Android, and Linux
🔧 Trusted by certified marine technicians, mechanics, and Mercury dealers worldwide

🔍 Model Background

The Mercury 15 HP EFI 4-stroke outboard (2018–2023) was part of Mercury’s innovative redesign focused on creating the lightest and most efficient portable 4-stroke engines in its class. Powered by a compact 333cc 2-cylinder engine with Electronic Fuel Injection (EFI), this model delivered instant starts, smooth acceleration, and outstanding fuel economy in a lightweight, easy-to-handle package.

Weighing as little as 99 pounds (45 kg), the 15 HP EFI was ideal for boaters who needed a portable solution without compromising performance. It offered multiple control options including manual or electric start, tiller or remote steering, and various shaft lengths — making it a popular choice for inflatables, aluminum boats, tenders, and small utility rigs.

Designed with user-friendly service features like a no-spill oil change system, maintenance-free valve train, low-vibration mounts, and SmartCraft compatibility, the 2018–2023 Mercury 15 HP EFI 4-stroke stands out for its quiet operation, modern technology, and dependable shallow-water performance.

📆 Model Years Covered:

• Mercury 15 HP EFI – 2018
• Mercury 15 HP EFI – 2019
• Mercury 15 HP EFI – 2020
• Mercury 15 HP EFI – 2021
• Mercury 15 HP EFI – 2022
• Mercury 15 HP EFI – 2023

📘 Manual Details:

• Model: Mercury 15 HP Four Stroke EFI
• Engine Type: 4-Stroke, 2-cylinder EFI
• Document Type: OEM Service & Repair Manual
• Manual ID: 90-8M0125265
• Language: English
• Publisher: Mercury Marine
• Pages: 400+ with full diagnostics, diagrams, and repair steps

📚 Manual Sections Include:

• General Information & Specifications
• Ignition & Charging System
• Switch boxes, stators, timing adjustment
• Fuel System
• Carburetors, 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 15 HP EFI FourStroke service manual PDF, 2018–2023 repair guide, 4-stroke outboard, fuel injection, gearcase, valve adjustment, ignition system, wiring schematics

❓ Mini FAQ:

Q: Is this the official Mercury factory service manual?
A: Yes – it's the complete OEM manual used by authorized Mercury repair centers worldwide.

Q: Does it include EFI diagnostics and complete wiring diagrams?
A: Absolutely – all fuel injection, ignition, and electrical systems are fully documented.

Q: Can I access it on a phone or tablet?
A: Yes – the PDF is searchable, bookmarked, and mobile-ready.

🧭 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.