Mercury 25 HP Jet EFI 4-Stroke 2016–2020 Service Repair Manual – PDF Download

🛠️ Mercury 25 HP Jet EFI 4-Stroke 2016–2020 Service Repair Manual – PDF Download

🧰 OEM Factory Workshop Manual – Covers Mercury 25 HP Jet EFI FourStroke Outboard Engines (Jet Drive, 526 cc EFI Models)
📲 Instant PDF Download – Compatible with Windows, macOS, iOS, Android, and Linux
🔧 Trusted by commercial operators, river guides, and Mercury-certified marine technicians

🔍 Model Background

The Mercury 25 HP Jet EFI 4-stroke outboard (2016–2020) was purpose-built for shallow-water environments where traditional propeller-driven engines would be impractical or at risk of damage. Using the same lightweight 500cc inline-3 EFI 4-stroke powerhead as the standard 30 HP model, this jet variant produced 25 horsepower at the nozzle and offered reliable performance for riverboats, duck hunting rigs, and flat-bottom sleds.

The engine featured Electronic Fuel Injection (EFI) for easy cold starts, precise throttle response, and efficient fuel consumption — even in varying conditions. The jet pump lower unit replaced the standard gearcase, enabling the motor to operate in water as shallow as 4 inches while minimizing the risk of snags and impact damage.

Available in tiller or remote configurations, the Mercury 25 HP Jet EFI 4-stroke included manual or electric start, SmartCraft compatibility, and low-maintenance design elements like a no-spill oil filter and maintenance-free valve train. This model remains a go-to choice for anglers and outdoorsmen seeking dependable shallow-water performance in a compact, fuel-efficient package.

📆 Model Years Covered:

• Mercury 25 HP Jet EFI – 2016
• Mercury 25 HP Jet EFI – 2017
• Mercury 25 HP Jet EFI – 2018
• Mercury 25 HP Jet EFI – 2019
• Mercury 25 HP Jet EFI – 2020

📘 Manual Details:

• Model: Mercury 25 HP Jet EFI FourStroke (3-cylinder, 526 cc)
• Drive Type: Jet Drive (High-Thrust Nozzle)
• Document Type: OEM Service & Repair Manual (Factory Shop Manual)
• Language: English
• Publisher: Mercury Marine
• Pages: 500+ with EFI diagnostics, exploded diagrams, and maintenance schedules

📚 Manual Sections Include:

• General Information & Specifications
• Ignition & Charging System
• Ignition coil, stator, voltage regulator, timing checks
• Fuel System
• EFI components, fuel pump, pressure testing, fuel injector service
• Powerhead
• Cylinder head, pistons, camshaft, crankshaft, valve lash adjustment
• Cooling System
• Thermostat, impeller, passages, flush procedures
• Midsection & Jet Drive
• Jet pump, impeller housing, steering nozzle, intake grate, wear ring
• Control Linkage & Adjustment
• Throttle and shift cables, idle speed adjustment
• Wiring Diagrams
• Complete EFI and ignition wiring diagrams with color-coded references

💾 Format & Compatibility:

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

🔍 Keywords:

Mercury 25 HP Jet EFI outboard service manual PDF, 2016–2020 repair guide, jet pump diagnostics, EFI fuel system, valve adjustment, wiring diagrams, OEM PDF

❓ Mini FAQ:

Q: Is this the official Mercury jet drive repair manual?
A: Yes – this is the factory-issued manual used by certified Mercury Jet Drive service centers.

Q: Does it cover jet pump assembly and impeller service?
A: Absolutely – includes jet pump teardown, wear ring specs, and steering system checks.

Q: Is the PDF mobile-friendly?
A: Yes – it works on all smartphones, tablets, and desktop platforms.

🧭 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.