Mercury FourStroke 2.1L 90 Outboard Motor
Service / Repair / Workshop Manual
DIGITAL DOWNLOAD
The official Mercury 90 HP FourStroke manual is a trusted resource for professional marine technicians and hands-on boat owners who need to perform routine maintenance or complex repairs.
This OEM service manual specifically covers Mercury’s 90-horsepower outboard 2.1-liter inline 4-cylinder four-stroke engine. Within a convenient PDF download, it gives detailed instructions and diagrams.
This 2.1-liter outboard PDF includes clear, step-by-step repair procedures for engine disassembly, cooling system service, fuel and ignition diagnostics, and lower unit repairs.
Whether you’re conducting a seasonal tune-up or troubleshooting a performance issue, this factory service manual equips you with the technical data and factory specs needed for efficient, accurate work.
Key features include:
- Fully searchable and printable PDF
- Complete wiring diagram, torque specs, and maintenance intervals
- All major systems covered, including engine, fuel, electrical, cooling, and exhaust
- Instant download, which means no waiting and no shipping
- Compatibility with Mercury 2.1L FourStroke 90 HP models
This workshop manual is used in professional service shops and home garages alike. It’s an essential tool for keeping your outboard running smoothly. Whether you’re servicing for performance, compliance, or longevity, the Mercury 90 HP FourStroke manual delivers the factory-backed insight you need. Trusted by marine professionals and boat owners for accuracy and reliability.
Format: PDF
Pages: 660
Quality: PERFECT! This manual is from the original digital source.
Models Covered: FourStroke 2.1L 75 / 90 / 115 motors and FourStroke 2.1L EU 80 / 100 / 115 motors
Table of Contents: Important Information (Master Specifications, Maintenance, General Information, Outboard Motor Installation, Storage), Electrical (Ignition, Charing / Starting Systems, Timing / Synchronizing / Adjustments, Accessory Wire Diagrams, Fault List), Fuel Systems (Theory of Operation, Troubleshooting / Diagnostics, Service Procedures, Emissions), Powerhead (Cylinder Block / Crankcase, Cylinder Head, Lubrication, Cooling), Midsection (Clamp / Swivel Brackets / Driveshaft Housing, Adapter Plate, Power Trim), Gear Housing (Standard Right-Hand Rotation Gear Housing, Command Thrust Rotation Gear Housing), Control Linkage and Attachments (Throttle / Shift Linkage, Big Tiller), Color Diagrams
Part Numbers: 90-8M0082471 July 2014 (serial number 2B095049 and above)
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