Mercury 250 HP V8 4-Stroke 2019–2023 Service Repair Manual – PDF Download

🛠️ Mercury 250 HP V8 4-Stroke 2019–2023 Service Repair Manual – PDF Download

🧰 OEM Factory Workshop Manual – Covers Mercury 250 HP V8 FourStroke CMS Outboards (Serial No. 2B529482 and up)
📲 Instant PDF Download – Works on Windows, macOS, iOS, Android, and Linux
🔧 Ideal for marine mechanics, boat dealerships, and Mercury-certified technicians

🔍 Model Background

The Mercury 250 HP V8 Four Stroke outboard (2019–2023) is part of Mercury’s advanced naturally aspirated V8 platform, introduced to replace the older supercharged inline-6 Verado models. Featuring a robust 4.6L V8 engine, this outboard offered strong acceleration, excellent midrange torque, and quiet, efficient operation — all in a lightweight design ideal for both recreational and light commercial use.

Designed for versatility, the 250 HP V8 Four Stroke was used across a wide range of boats including center consoles, bay boats, pontoons, and multi-engine offshore rigs. It featured Mercury’s Advanced Range Optimization (ARO) for better fuel efficiency, Adaptive Speed Control (ASC) for steady RPM through turns and waves, and an optional Digital Throttle & Shift (DTS) system for smooth control.

This model was well-received for its top-mounted service door, simplified maintenance, and impressive power-to-weight ratio. As of 2023, it remains one of Mercury’s most popular high-output FourStroke engines, offering modern reliability without the complexity of forced induction systems.

📆 Model Years Covered:

• Mercury 250 HP V8 Four Stroke – 2019
• Mercury 250 HP V8 Four Stroke – 2020
• Mercury 250 HP V8 Four Stroke – 2021
• Mercury 250 HP V8 Four Stroke – 2022
• Mercury 250 HP V8 Four Stroke – 2023

📘 Manual Details:

• Model: Mercury 250 HP V8 CMS FourStroke
• Serial Numbers: 2B529482 and above
• Engine Type: EFI, V8, 4-Stroke
• Document Type: OEM Service & Repair Manual
• Manual ID: 90-8M0182078
• Language: English
• Publisher: Mercury Marine
• Pages: 900+ with step-by-step factory procedures and diagnostics

📚 Manual Sections Include:

• General Information & Specifications
• Ignition & Charging System
• Stator, ignition timing, flywheel, ECM, voltage regulation
• Fuel System
• EFI components, fuel rail, high-pressure pump, SmartCraft diagnostics
• Powerhead
• Camshaft, crankshaft, pistons, valve train, oil circulation
• Cooling System
• Thermostats, impeller, water passages, cooling system sensors
• Midsection & Trim
• Trim system, swivel bracket, vibration dampening, mounts
• Gearcase Assembly
• Propshaft, gear set, seals, water pickup, shift shaft
• Control Linkage & Adjustment
• Throttle and shift linkage, DTS setup, idle RPM adjustment
• Wiring Diagrams
• SmartCraft, EFI, and ignition wiring schematics with color coding

💾 Format & Compatibility:

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

🔍 Keywords:

Mercury 250 HP V8 FourStroke service manual PDF, 2019–2023 repair guide, EFI fuel system, DTS controls, SmartCraft wiring, valve specs, cooling, gearcase

❓ Mini FAQ:

Q: Is this the full OEM factory repair manual?
A: Yes – this is the official Mercury Marine manual used by dealers and certified repair techs.

Q: Does it include SmartCraft and DTS support?
A: Absolutely – all diagnostics, wiring diagrams, and system adjustments are included.

Q: Can I open the PDF on mobile and desktop?
A: Yes – the manual is compatible with phones, tablets, laptops, and desktops.

🧭 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.