Mercury 115 HP 4-Stroke EFI Outboard 2001–2005 Service Repair Manual – PDF Download

🛠️ Mercury 115 HP 4-Stroke EFI Outboard 2001–2005 Service Repair Manual – PDF Download

🧰 OEM Factory Workshop Manual – Covers Mercury 115 HP EFI 4-Stroke Outboard Engines (Serial No. 0T178500 and up)
📲 Instant PDF Download – Fully compatible with Windows, macOS, iOS, Android, and Linux
🔧 Ideal for technicians, boat owners, and Mercury-certified marine mechanics

🔍 Model Background

The Mercury 115 HP Four Stroke EFI outboard (2001–2005) marked a major milestone in Mercury’s transition from 2-stroke to 4-stroke technology. Developed in partnership with Yamaha during this era, this model was based on a 1.7L inline-4 four-stroke powerhead and featured a multi-port Electronic Fuel Injection (EFI) system, offering smoother operation, improved fuel efficiency, and reduced emissions compared to its 2-stroke predecessors.

Ideal for pontoons, bay boats, and freshwater fishing rigs, the 115 EFI Four Stroke gained popularity for its quiet idle, low maintenance requirements, and overall reliability. It featured mechanical throttle and shift controls, oil-bathed camshafts, and a well-balanced inline-4 layout that delivered smooth midrange torque without the weight of a V6.

Though eventually replaced by Mercury’s in-house 2.1L Four Stroke platform in 2006, the 2001–2005 115 EFI remains a respected and well-supported engine in the used market. Many are still in active service today thanks to their solid build quality, strong parts availability, and reputation for dependable performance.

📆 Model Years Covered:

• Mercury 115 HP EFI – 2001
• Mercury 115 HP EFI – 2002
• Mercury 115 HP EFI – 2003
• Mercury 115 HP EFI – 2004
• Mercury 115 HP EFI – 2005

📘 Manual Details:

• Model: 115 HP 4 Stroke EFI
• Serial Numbers: 0T178500 and above
• Document Type: OEM Service & Repair Manual (Factory Shop Manual)
• Language: English
• Publisher: Mercury Marine
• Pages: 500+ with detailed repair procedures, diagnostics, and diagrams

📚 Manual Sections Include:

• General Information & Specifications
• Ignition & Charging System
• Flywheel, stator, ECM, ignition coils, spark testing
• Fuel System
• Electronic Fuel Injection (EFI), fuel pump, injectors, sensors, link & sync
• Powerhead
• Valve train, pistons, camshaft, crankshaft, cylinder head
• Cooling System
• Water pump, thermostat, passages, overheat diagnostics
• Midsection & Exhaust
• Mounts, driveshaft housing, exhaust system, vibration control
• Gearcase Assembly
• Propshaft, shift rod, gear set, seals, water pickup
• Control Linkage & Adjustment
• Throttle and shift cables, idle speed tuning
• Wiring Diagrams
• Complete EFI and ignition schematics with color-coded component labels

💾 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 115 HP FourStroke EFI outboard service manual PDF, 2001–2005 repair guide, powerhead, fuel injection, gearcase, ignition, OEM Mercury PDF manual

❓ Mini FAQ:

Q: Is this the same manual used by Mercury dealers?
A: Yes – it’s the official OEM repair manual used by certified Mercury technicians.

Q: Does it include EFI and full engine wiring diagrams?
A: Absolutely – includes color-coded schematics and full EFI component coverage.

Q: Is it mobile and desktop friendly?
A: Yes – the PDF is fully searchable and works on all modern devices.

🧭 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, Yamaha, Suzuki, 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.