This comprehensive repair manual provides detailed instructions and technical specifications for a wide range of Mercury Mariner outboard models manufactured between 1986 and 2003. The manual covers 2-stroke engines with horsepower ratings of 6HP, 8HP, 9.9HP, 10HP, and 15HP.

It encompasses a wide array of topics, including:

* **General Information:** Essential overview of the outboard's design and operation.
* **Routine Maintenance:** Step-by-step guidance on regular maintenance procedures, ensuring your engine runs smoothly.
* **Engine Removal and Installation:** Detailed instructions for removing and installing the engine, including proper procedures and safety precautions.
* **Fuel System:** In-depth explanations of fuel system components, troubleshooting fuel-related issues, and performing adjustments.
* **Lubrication and Cooling System:** Comprehensive coverage of lubrication and cooling system components, maintenance procedures, and troubleshooting.
* **Engine Specifications:** Precise specifications for various engine parts and components, aiding in understanding and identifying the correct parts for repairs.
* **Transmission, Drive Chain & Sprockets:** Detailed information on the transmission system, drive chain, sprockets, and related components.
* **Steering System:** Technical specifications and repair instructions for the outboard's steering system.
* **Shocks:** Comprehensive guide for working on the shock absorbers, covering maintenance and repair procedures.
* **Body Work:** Information on the outboard's bodywork, including repair techniques and replacement procedures.
* **Intake & Exhaust:** Explanations of the intake and exhaust systems, troubleshooting common issues, and performing adjustments.
* **Electrical System:** Detailed information on the electrical system, including wiring diagrams, troubleshooting, and repair procedures.
* **Advanced Troubleshooting:** Troubleshooting techniques for complex issues, providing insights into diagnosing engine faults.

This manual is designed to be a valuable resource for both experienced mechanics and DIY enthusiasts, offering the necessary information to perform routine maintenance, troubleshoot problems, and undertake comprehensive repairs.

The 1986-2003 Mercury Mariner 6HP, 8HP, 9.9HP, 10HP, and 15HP two-stroke outboard motors were popular choices for recreational boaters seeking reliable and affordable power. These compact and lightweight outboards were known for their simplicity of operation, making them ideal for small boats and dinghies. The models shared a number of design features, including a single-cylinder engine with a 2-stroke design and a manual start system. They offered a range of power options to suit different boat sizes and usage, with the 6HP model being the most basic and the 15HP offering the most power. Despite their age, these Mercury Mariner outboards remain popular among boat owners due to their robust construction, straightforward maintenance, and availability of parts.

These outboards were built during a time when two-stroke engines were prevalent in the marine industry. They were known for their power-to-weight ratio and ease of operation, but also drew criticism for their higher emissions compared to four-stroke engines. Many of the models within this range featured a "Command Thrust" system, which increased torque at low RPMs, providing better acceleration and maneuverability for smaller boats. The engines were equipped with a variety of safety features, including a kill switch and a tilt mechanism for easy storage and transport. While these outboards are built to be durable and reliable, regular maintenance is crucial to ensure their longevity. The repair manual is an essential resource for any owner looking to maintain their engine, perform basic repairs, or troubleshoot any issues that may arise. The manual covers a comprehensive range of topics, including engine operation, troubleshooting, maintenance procedures, and part replacement guidelines.