The Mercury Racing 245 HP Carb, 260 HP EFI, 280 HP, ROS Consumer 2.5 Liter Outboard Service Manual covers the detailed maintenance, repair, and troubleshooting procedures for the Mercury 2.5 Liter high-performance outboard engines with serial numbers ranging from D030200 to OD936999.
 
This OEM factory service manual provides step-by-step instructions to guide professional technicians, experienced racers, and hobbyists on working with the renowned Nicasil side-injected horn motors. It is an indispensable resource for optimizing the performance of these high-performance Mercury Racing 2-stroke outboard engines.
 
Key Sections of the Mercury OEM High-Performance Outboard Technical Manual
 
General Tech and Specifications
 
Comprehensive specifications for 245 HP, 260 HP, and 280 HP models.
Essential data on compression, ignition timing, fuel recommendations, and engine tuning.
 
Electrical and Ignition Systems
 
Testing and troubleshooting ignition system components for the Mercury Racing 2.5 Liter engines.
Electrical system diagnostics, including key switch tests, ignition timing calibration, and coil resistance measurement.
 
Fuel Systems
 
Maintenance and troubleshooting for both carbureted and EFI (Electronic Fuel Injection) models.
Detailed specifications for fuel pressure and injector servicing to ensure optimal performance.
 
Powerhead and Engine Repair
 
Disassembly and reassembly of the Mercury 2.5L Nicasil powerhead.
Methods for diagnosing compression issues and inspecting pistons for wear and tear.
 
Lower Unit (Gearcase)
 
Maintenance for standard and counter-rotating gear housings.
Detailed gear lubrication guides and propeller selection advice for high-performance applications.
 
Power Trim Systems
 
Servicing hydraulic power trim systems for precise adjustments.
Fine-tuning trim limits and improving boat handling in racing conditions.
 
Storage and Maintenance
 
Out-of-season storage guidelines to prevent wear and corrosion.
Routine lubrication schedules and cleaning techniques designed for Mercury Racing 2.5L outboard engines.
 
Safety and Best Practices
 
Critical safety alerts, warnings, and best practices to prevent injuries.
Ensuring compliance with Mercury factory standards for safe engine operation.
 
This manual is a vital resource for racers, boat mechanics, and outboard enthusiasts looking to maintain, repair, or optimize Mercury Racing 2.5L V6 2-stroke outboard engines. By following its precise guidance, you can ensure the reliability, safety, and peak performance of engines like the 260 EFI, 280 HP, and 245 Carb models.
 
The service manual emphasizes using Mercury-recommended tools, proper diagnostic procedures, and high-quality parts to keep these high-performance motors running at their best.
 
(Download the Mercury Factory OEM High-Performance 2.5 Liter 2-Stroke V6 Service and Technical Manual Now)
 
Get your copy of the Mercury Racing 2.5L OEM Service Manual in high-quality PDF format today. It’s the ultimate guide for anyone serious about maintaining or repairing these legendary 2-stroke outboard motors, known for their power and durability.