How To Fog A 4 Stroke Outboard Motor

How to Fog a 4-Stroke Outboard Motor: A Comprehensive Guide

Properly fogging your 4-stroke outboard motor is crucial for its long-term health and performance. This process protects internal engine components from corrosion and damage during periods of storage, particularly over winter. This guide provides a step-by-step process, ensuring your outboard is ready for its next adventure.

Understanding the Importance of Fogging

Fogging your outboard motor isn't just a recommendation – it's a vital maintenance step. Without fogging, moisture can condense inside the engine, leading to rust and corrosion. This can damage vital parts, resulting in costly repairs or even complete engine failure. Fogging coats these parts with a protective layer of oil, preventing this deterioration.

What is Fogging Oil?

Fogging oil is a specially formulated lubricant designed to withstand the conditions within an engine during storage. Unlike regular engine oil, fogging oil is designed to create a protective film that clings to internal components, preventing corrosion. It is crucial to use fogging oil, not regular engine oil, for this process.

The Fogging Process: A Step-by-Step Guide

Before you begin, ensure you have the necessary equipment: fogging oil, a fogging attachment (often included with the oil), and safety glasses.

Step 1: Prepare Your Outboard

1. Ensure the engine is OFF and completely cooled down. Never attempt to fog a hot engine.
2. Disconnect the fuel line. This prevents any fuel from mixing with the fogging oil.
3. Remove the spark plugs. This allows the fogging oil to penetrate the cylinders effectively.

Step 2: Attach the Fogging Device

1. Connect the fogging attachment to the fogging oil bottle. Most fogging oils come with a special fitting designed to spray the oil into the intake.
2. Carefully insert the fogging attachment into the intake manifold. Be certain that it's secured tightly and there are no leaks.

Step 3: Fogging the Engine

1. With the spark plugs removed, crank the engine over using the starter motor for several seconds. The oil will be drawn into the cylinders, coating the internal components. It will be noticeable from the exhaust. Don't over-crank; a brief period is sufficient.
2. Manually rotate the engine several times by hand if you don't have an electric starter. This is sufficient to coat most of the internal components.
3. Remove the fogging attachment.

Step 4: Post-Fogging Steps

1. Replace the spark plugs. Ensure the correct spark plugs are used and are securely tightened.
2. Reconnect the fuel line.
3. Store the outboard in a cool, dry place.

Tips for Optimal Fogging

• Use the correct fogging oil. Using the wrong type of oil can negate the process’s effectiveness.
• Follow the manufacturer's recommendations. Consult your outboard's manual for specific guidelines and instructions.
• Fog your engine annually, or more frequently if you live in a humid climate.
• Proper storage is key. Even with fogging, storing your outboard in a damp environment can compromise its longevity.

Conclusion

Fogging your 4-stroke outboard motor is a simple yet effective way to protect it from the damaging effects of corrosion during storage. By following these steps and employing the right techniques, you can ensure your engine remains in optimal condition for many years to come, saving you significant costs on repairs and ensuring smooth sailing.