This comprehensive workshop service manual covers the repair and overhaul of Mercury Mariner 240 HP M2 Jet Drive Outboards manufactured between 1999 and 2004. The manual provides detailed instructions and diagrams for a wide range of maintenance and repair procedures, including:

* **Engine Disassembly and Reassembly:** Step-by-step instructions for taking apart and putting back together the engine, covering components like the cylinder heads, pistons, crankshaft, and connecting rods.
* **Fuel System:** Detailed information on diagnosing and repairing issues with the fuel injectors, fuel pumps, and fuel lines.
* **Ignition System:** Guidance on troubleshooting and repairing the ignition system, including the spark plugs, ignition coils, and distributor.
* **Cooling System:** Instructions for maintaining and repairing the cooling system, including the water pump, thermostat, and cooling passages.
* **Jet Drive System:** Comprehensive coverage of the jet drive unit, including disassembly, inspection, and repair of the pump, impeller, and nozzle.
* **Electrical System:** Information on diagnosing and repairing electrical problems, including the wiring harness, starter, alternator, and battery.
* **Troubleshooting and Diagnostics:** A detailed section dedicated to diagnosing engine problems and using diagnostic tools.
* **Specifications and Adjustments:** Complete specifications for all engine components and systems, along with instructions for making adjustments.

The manual is written in clear and concise language, and it includes numerous illustrations and diagrams to make it easy to understand. It is an essential resource for anyone who wants to perform their own maintenance and repairs on a Mercury Mariner 240 HP M2 Jet Drive Outboard.

The Mercury Mariner 240 HP M2 Jet Drive, produced from 1999 to 2004, was a powerful and versatile outboard motor designed specifically for jet propulsion. This innovative engine offered a unique combination of speed, maneuverability, and shallow-water performance, making it ideal for a variety of applications, including personal watercraft, fishing boats, and even small commercial vessels. The Mariner 240 HP M2 Jet Drive featured a 2.5-liter, four-cylinder, naturally aspirated engine with a displacement of 152 cubic inches. This engine was capable of producing an impressive 240 horsepower at 5500 RPM, providing ample power for thrilling performance. The jet drive system, a unique feature of this motor, allowed for exceptional handling in shallow waters and maneuverability in tight spaces. Unlike traditional propeller-driven outboards, the jet drive system used a centrifugal pump to create a high-pressure water stream that propelled the boat forward. The jet drive unit also provided a significant advantage in shallow water conditions, as the lack of a propellor eliminated the risk of damage or entanglement on submerged objects.

The Mercury Mariner 240 HP M2 Jet Drive was renowned for its durability and reliability. The engine was built with high-quality components and meticulous engineering, ensuring long-lasting performance and minimal downtime. The jet drive system, with its robust design and corrosion-resistant materials, also contributed to the overall longevity of the motor. Additionally, the Mariner 240 HP M2 Jet Drive was known for its user-friendly features and ease of maintenance. The intuitive controls and accessible components made it simple for boat owners to operate and maintain the motor effectively. Moreover, the availability of a comprehensive service repair manual provided detailed instructions and troubleshooting tips, further simplifying maintenance and repairs. This user-friendly design and comprehensive documentation ensured that boat owners could enjoy the full potential of the Mariner 240 HP M2 Jet Drive for years to come.