How To Store A 4 Stroke Outboard

(Many of the links in this article redirect to a specific reviewed product. Your purchase of these products through affiliate links helps to generate commission for Storables.com, at no extra cost. Learn more)

Introduction

Storing a 4-stroke outboard properly is crucial to ensure its longevity and optimal performance. Whether you’re a boating enthusiast or a seasonal user, proper storage practices can help protect your outboard from damage caused by harsh weather conditions, corrosion, and other storage-related issues. In this article, we will guide you through the essential steps to store your 4-stroke outboard effectively.

Choosing an appropriate storage location, preparing the outboard for storage, and taking precautions to protect its various components are key factors in maintaining the outboard’s reliability and prolonging its lifespan. Following these steps will also ensure that your outboard is ready for action when you decide to hit the water again.

In the following sections, we will explore each step in detail, providing you with valuable insights and practical tips to make your 4-stroke outboard’s storage a hassle-free experience.

Choosing an Appropriate Storage Location

When it comes to storing a 4-stroke outboard, selecting the right storage location is essential. The ideal storage space should protect the outboard from adverse weather conditions, such as extreme heat, cold temperatures, moisture, and direct sunlight. Here are a few factors to consider when choosing a suitable storage location:

1. Indoor Storage

If possible, opt for indoor storage, such as a garage, storage unit, or boathouse. Indoor storage provides excellent protection against the elements, minimizing the risk of damage from temperature extremes and UV exposure. It also helps prevent the accumulation of debris, dust, and pests that could harm the outboard.

2. Outdoor Storage

If indoor storage is not available, outdoor storage can still be a viable option. However, it is crucial to take extra precautions to protect the outboard. Look for a well-sheltered area, such as under a durable boat cover or in a ventilated shed. Ensure that the storage space is away from direct sunlight, and provide additional coverage to shield the outboard from rain, snow, and other elements.

3. Consider Climate Control

If you live in an area with extreme temperature variations or high humidity, you may want to consider a climate-controlled storage facility. Climate-controlled storage maintains a constant temperature and humidity level, preventing potential damage to sensitive components of the outboard.

4. Security

Ensure that the storage location offers adequate security measures to protect your outboard from theft. This may include a secure door, surveillance cameras, or on-site security personnel.

5. Accessibility

Consider the ease of access to the storage space. It should allow you to check on the outboard periodically and perform maintenance tasks if needed without any difficulty.

By carefully selecting the storage location, you can provide optimal protection to your 4-stroke outboard during its period of inactivity. Remember, a well-chosen storage space will not only protect your investment but also ensure that your outboard remains in excellent condition for years to come.

Preparing the Outboard for Storage

Before storing your 4-stroke outboard, it’s crucial to properly prepare it to avoid potential damage and ensure a smooth start-up when you’re ready to use it again. Follow these steps to prepare your outboard for storage:

1. Clean the Outboard

Start by thoroughly cleaning the exterior of the outboard. Remove any dirt, debris, or salt buildup using mild soap, water, and a soft brush. Pay special attention to areas prone to corrosion, such as the cooling system, exhaust components, and the lower unit. Rinse the outboard with clean water and allow it to dry completely.

2. Inspect and Replace Damaged Parts

Carefully inspect the outboard for any signs of wear, damage, or corrosion. Check the propeller, fuel lines, hoses, and electrical connections. Replace any damaged or worn-out parts before storing the outboard to prevent further deterioration during the storage period.

3. Lubricate Moving Parts

Apply a suitable marine-grade lubricant to lubricate all moving parts, such as the throttle linkage, control cables, and steering mechanism. This will help prevent rust or sticking issues that may arise during storage.

4. Disconnect the Fuel Line

Disconnect the fuel line and run the engine until it stops to burn off any remaining fuel in the carburetors. This step helps prevent the carburetors from becoming clogged due to fuel deposits while the outboard is in storage.

5. Remove the Spark Plugs

Remove the spark plugs and inspect them. If they are worn or damaged, replace them before storing the outboard. Applying a small amount of fogging oil to the cylinders and then replacing the spark plugs will help protect the internal components during storage.

6. Change the Engine Oil

Change the engine oil and oil filter as part of the preparation process. Old oil may contain contaminants that can cause damage if left in the system during storage. Fresh oil will provide better engine protection during the dormant period.

By following these preparation steps, you can safeguard your 4-stroke outboard and ensure that it is ready for optimum performance when you’re ready to hit the water again. Properly preparing the outboard for storage will help prevent deterioration and potential damage, prolonging its lifespan in the long run.

Flushing and Draining the Cooling System

Flushing and draining the cooling system of your 4-stroke outboard is an essential step in preparing it for storage. This process helps remove any residual salt, debris, or contaminants that can lead to corrosion and blockages. Follow these steps to flush and drain the cooling system:

1. Start with a Cool Engine

Ensure that the engine has cooled down completely before starting the flushing and draining process. This will prevent any potential burns and ensure a safer working environment.

2. Attach a Flushing Device

Attach a flushing device to the water intake on the lower unit of the outboard. This device allows fresh water to flow through the cooling system and flush out any saltwater or debris.

3. Connect a Water Source

Connect a garden hose to the flushing device. Turn on the water source and let it flow through the outboard’s cooling system. Make sure the water pressure is not too high, as excessive pressure can damage the system’s components.

4. Start the Engine

Start the engine and let it idle for a few minutes. This will allow the fresh water to circulate through the cooling system, flushing out any remaining salt, debris, or contaminants.

5. Drain the Cooling System

After flushing, turn off the engine and disconnect the garden hose from the flushing device. Locate the drain plugs on the outboard’s cooling system, typically found on the lower unit or cylinder block.

6. Remove the Drain Plugs

Using a wrench or socket, carefully remove the drain plugs to allow any residual water to drain out from the cooling system. Ensure that the outboard is positioned in a way that allows proper drainage without any obstruction.

7. Inspect the Drain Plugs

Inspect the drain plugs for any signs of damage or corrosion. Replace them if necessary to maintain the integrity of the cooling system.

Flushing and draining the cooling system is an important maintenance step to protect your 4-stroke outboard from potential damage caused by saltwater or debris buildup. By following these steps, you can ensure that your outboard’s cooling system remains clean and free from blockages during its storage period.

Changing the Oil and Oil Filter

Changing the oil and oil filter in your 4-stroke outboard is an essential maintenance task that should be performed before storing the engine for an extended period. Fresh oil helps to lubricate the internal components and provides better protection against corrosion and wear. Follow these steps to change the oil and oil filter:

1. Gather the Necessary Tools and Supplies

Before you begin, gather the tools and supplies you’ll need:

• Oil drain pan
• Ratchet or wrench
• New oil filter
• Fresh engine oil
• Oil filter wrench (if necessary)

2. Position the Outboard for Easy Access

Ensure that the outboard is positioned in a way that allows easy access to the oil drain plug and oil filter. This may require tilting the outboard or accessing it from beneath the engine cowling.

3. Warm Up the Engine (Optional)

While not mandatory, warming up the engine for a few minutes can help to thin the oil and make it easier to drain. However, be cautious not to touch any hot surfaces during this process.

4. Place the Oil Drain Pan

Position the oil drain pan underneath the oil drain plug to catch the old oil. Ensure that it is placed securely to avoid spills and mess.

5. Remove the Oil Drain Plug

Using a ratchet or wrench, carefully loosen and remove the oil drain plug. Allow the old oil to drain completely into the oil drain pan. Be mindful of any hot oil that may spill out during this process.

6. Replace the Oil Filter

If necessary, locate the oil filter on your outboard. Using an oil filter wrench, remove the old oil filter. Replace it with a new oil filter, ensuring that it is installed snugly but not overtightened. Consult the manufacturer’s instructions for the proper torque specification.

7. Drain the Oil Reservoir

Some 4-stroke outboards have an oil reservoir separate from the engine. Check the manufacturer’s instructions to determine if your outboard has this feature. If it does, drain the oil from the reservoir according to the manufacturer’s recommendations.

8. Refill with Fresh Oil

Refill the engine with the recommended amount and viscosity of fresh engine oil. Use a funnel to avoid spills and ensure that the oil level is correct according to the manufacturer’s specifications. Check for any leaks around the oil drain plug and oil filter after filling.

Changing the oil and oil filter is an essential step in maintaining the performance and longevity of your 4-stroke outboard. By following these steps and using the recommended oil, you can ensure that your engine is properly lubricated and protected during storage.

Fogging the Engine

Fogging the engine is a crucial step in preparing your 4-stroke outboard for long-term storage. Fogging involves coating the internal components of the engine with a fogging oil or corrosion inhibitor to protect them from moisture and oxidation. This process helps prevent rust, corrosion, and other potential issues that can occur during the storage period. Follow these steps to properly fog your outboard engine:

1. Gather the Necessary Supplies

Before you begin, gather the following supplies:

• Fogging oil or corrosion inhibitor
• Rag or cloth
• Aerosol can with a straw nozzle (if required)

2. Start the Engine

Start the engine and let it warm up for a few minutes. This will ensure that the fogging oil mixes thoroughly with the existing oil and reaches all internal engine components.

3. Locate the Carburetor or Intake Manifold

Locate the carburetor or intake manifold on your outboard. This is the point where you will introduce the fogging oil into the engine.

4. Spray the Fogging Oil

With the engine running, use the aerosol can with the straw nozzle to spray fogging oil into the carburetor or intake manifold. Apply the oil in short bursts to ensure even distribution throughout the engine. Follow the manufacturer’s instructions regarding the recommended amount of fogging oil to use.

5. Increase Engine RPM (If Applicable)

If your outboard has a throttle control, gradually increase the engine RPM. This will help the fogging oil to reach and protect different parts of the engine, including the piston rings, valves, and cylinder walls.

6. Turn Off the Engine

Once you have fogged the engine, turn off the engine and remove the key. Allow the fogging oil to settle and coat the internal engine components for a few minutes.

7. Wipe Excess Oil

Using a rag or cloth, gently wipe away any excess fogging oil from the exterior surfaces of the engine. This will help prevent the oil from attracting dirt or debris during the storage period.

Fogging the engine provides an additional layer of protection for your 4-stroke outboard during long-term storage. It helps preserve the engine’s internal components, preventing corrosion and ensuring a smooth start-up when you’re ready to use the engine again.

Stabilizing the Fuel System

Properly stabilizing the fuel system of your 4-stroke outboard is essential to prevent issues caused by stale or degraded fuel during storage. Fuel degradation can lead to difficulties in starting the engine, clogged fuel lines, and damage to the carburetors. Follow these steps to effectively stabilize the fuel system:

1. Choose a Fuel Stabilizer

Select a reputable fuel stabilizer specifically designed for marine engines. Look for stabilizers that protect against ethanol-related issues, reduce oxidation, and help keep the fuel stable over an extended period.

2. Add Fuel Stabilizer to the Fuel Tank

Prior to storing your outboard, add the recommended amount of fuel stabilizer to the fuel tank. Consult the instructions provided by the manufacturer of the fuel stabilizer for the correct dosage based on the size of your fuel tank.

3. Run the Engine

Start the engine and let it run for a few minutes. This will allow the fuel stabilizer to circulate throughout the fuel system and protect the internal components. Ensure that the stabilizer-treated fuel reaches the carburetors.

4. Top Up the Fuel Tank

Fill the fuel tank to its maximum capacity to minimize the air space inside the tank. This reduces the chances of condensation forming and diluting the fuel during storage.

5. Run the Engine Again

Start the engine once more and let it run for a few minutes to ensure the treated fuel reaches all parts of the fuel system, including the carburetors and fuel injectors.

6. Monitor Fuel Condition

Throughout the storage period, periodically inspect the fuel for any signs of degradation, such as separation, water contamination, or foul odor. If any issues are detected, consult a professional for advice on how to address them.

7. Use Fresh Fuel When Restarting

When you’re ready to use your outboard again after storage, it’s recommended to use fresh fuel to ensure optimal performance. Drain any remaining treated fuel from the fuel tank and replace it with fresh, high-quality fuel.

By properly stabilizing the fuel system using a fuel stabilizer, you can prevent fuel-related issues and maintain the integrity of your 4-stroke outboard’s fuel system during the storage period. This simple yet important step will help ensure that your outboard is ready for action when you’re ready to hit the water again!

Removing the Battery (if applicable)

If your 4-stroke outboard is equipped with a battery, it is important to properly remove and store it during periods of extended storage. Removing the battery helps prevent power drainage, corrosion, and potential damage to the electrical system. Follow these steps to safely remove and store the battery:

1. Gather the Necessary Tools and Supplies

Before you begin, gather the following tools and supplies:

• Protective gloves
• A small adjustable wrench or battery terminal wrench
• Battery cleaning solution or a mixture of baking soda and water
• A battery brush or toothbrush
• Clean, dry cloth or paper towels
• Battery storage container or a clean, dry area

2. Ensure Safety Precautions

Before removing the battery, ensure that the ignition switch is turned off. Wear protective gloves and eye goggles to protect yourself from acid and potential hazards.

3. Disconnect the Battery Cables

Using the small adjustable wrench or battery terminal wrench, carefully loosen and remove the negative (-) battery cable first, followed by the positive (+) cable. Avoid touching both cable ends simultaneously to prevent short circuits.

4. Inspect the Battery

Inspect the battery for any signs of damage, leaks, or corrosion on the terminals. If necessary, clean the battery terminals with a battery cleaning solution or a mixture of baking soda and water. Use a battery brush or toothbrush to scrub away any corrosion or residue. Wipe the terminals with a clean, dry cloth or paper towel.

5. Store the Battery

If possible, use a battery storage container specifically designed for battery storage. Otherwise, store the battery in a clean, dry area away from moisture and extreme temperatures. Avoid placing the battery directly on concrete surfaces, as this can cause discharge. It is also recommended to periodically check the battery’s charge during storage and recharge as needed.

6. Reinstall the Battery

When you’re ready to use your outboard again, reinstall the battery following the reverse order of removal. Reconnect the positive (+) cable first, followed by the negative (-) cable. Make sure the connections are secure but not excessively tight.

By properly removing and storing the battery, you can prolong its lifespan and ensure trouble-free operation when you’re ready to use your 4-stroke outboard again. Taking the time to care for the battery during periods of storage will help maintain the electrical system’s functionality and prevent any potential issues.

Cleaning and Protecting the Outboard

Cleaning and protecting your 4-stroke outboard is essential for maintaining its appearance, preventing corrosion, and prolonging its overall lifespan. Regular cleaning and the application of protective coatings will help keep your outboard in top condition. Follow these steps to effectively clean and protect your outboard:

1. Rinse with Fresh Water

Start by rinsing the entire outboard with fresh water. This will remove any salt, dirt, or debris that may have accumulated during use. Use a hose or a bucket of water and a soft brush or sponge to gently clean the surfaces.

2. Use Appropriate Cleaning Solutions

For stubborn dirt or grime, use a mild detergent or an approved marine cleaner. Avoid using harsh chemicals or abrasive cleaning agents, as they may damage the paint or protective coatings on the outboard. Follow the manufacturer’s instructions for dilution and application of the cleaning solution.

3. Scrub and Rinse Thoroughly

Scrub the surfaces of the outboard using a soft brush or sponge. Pay close attention to hard-to-reach areas, such as under the cowling and around the motor mounts. Rinse the outboard thoroughly with fresh water to remove any residue from the cleaning solution.

4. Dry the Outboard

After rinsing, use a clean, dry cloth or towel to dry the outboard. Make sure to remove any excess water, especially in crevices and around electrical components. Be particularly careful when drying sensitive electrical connections to prevent any damage or corrosion.

5. Apply a Protective Coating

Apply a suitable protective coating to the painted surfaces of the outboard. This can include a wax or polish specifically formulated for marine use. Apply the coating according to the manufacturer’s instructions, using a clean, dry cloth or sponge. This will help protect the outboard from UV rays, saltwater, and other environmental elements.

6. Lubricate Moving Parts

Apply a thin layer of lubricant to moving parts, such as hinges, linkages, and throttle controls. This will help prevent rust, corrosion, and stiffness during storage. Use a marine-grade lubricant and ensure that it is appropriate for the specific components and areas of the outboard.

7. Inspect and Touch Up Paint (if needed)

Inspect the outboard’s paintwork for any scratches, chips, or areas of exposed metal. If necessary, touch up these areas with matching paint or a suitable marine-grade touch-up paint. This will help prevent further corrosion and maintain the appearance of the outboard.

By regularly cleaning and protecting your 4-stroke outboard, you can keep it looking and performing its best. These simple maintenance steps will help prevent corrosion, extend the lifespan of your outboard, and ensure many seasons of enjoyable boating.

Covering and Securing the Outboard

Properly covering and securing your 4-stroke outboard is an important step in protecting it from the elements, dust, and potential damage during storage. A well-fitted cover will help prevent moisture buildup, UV damage, and debris accumulation. Follow these steps to effectively cover and secure your outboard:

1. Choose an Outboard Cover

Select a high-quality cover specifically designed for outboard motors. Look for a cover made from durable and breathable material that provides protection against UV rays, water, and dust. Consider a cover that is mildew resistant and has reinforced stitching for added durability.

2. Clean and Dry the Outboard

Before covering the outboard, ensure that it is clean and completely dry. This will help prevent moisture from getting trapped beneath the cover, potentially causing corrosion or mold growth. Refer to the earlier section on cleaning the outboard for guidance.

3. Position the Cover

Carefully position the cover over the outboard, ensuring it fits snugly and covers all exposed components. Pay attention to areas such as the cowling, controls, and lower unit. Check that any special features, such as ventilation flaps or zippers, are properly aligned and functioning.

4. Secure the Cover

Once the cover is in place, use the provided straps, buckles, or drawstrings to secure it tightly. This will help prevent the cover from coming loose or blowing off during high winds. Ensure that the cover is secured without causing any stress or damage to the outboard’s components.

5. Use Additional Protection (if needed)

If you are storing your outboard outdoors or in an area with intense sun exposure, consider using additional protection, such as a UV-resistant spray or treatment, to further safeguard the outboard from UV damage.

6. Check the Cover Periodically

Throughout the storage period, periodically check the cover for any signs of wear, damage, or water pooling. Address any issues promptly to ensure the cover continues to provide adequate protection to the outboard.

7. Store in a Safe Location

Store the covered outboard in a safe location, such as a garage, storage unit, or boathouse. Ensure that it is placed on a secure and stable surface, away from any potential hazards. If storing outdoors, choose a well-sheltered area that provides additional protection from the elements.

By properly covering and securing your 4-stroke outboard, you can provide an added layer of protection against the elements and potential damage during storage. Take the time to invest in a quality cover and follow these steps to ensure that your outboard remains in excellent condition for years to come.

Monitoring the Outboard During Storage

While your 4-stroke outboard is in storage, it’s important to periodically monitor its condition to ensure that it remains in good shape and is ready for use when you need it. Here are some key aspects to consider when monitoring your outboard during storage:

1. Regular Inspections

Perform regular visual inspections of the outboard to check for any signs of damage, leaks, or pests. Look for cracks, corrosion, or any abnormalities that may have occurred during storage. Address any issues promptly to prevent further damage or deterioration.

2. Check the Fuel System

Monitor the condition of the fuel system during storage. Check for any leaks, fuel degradation, or water contamination in the fuel tank. If necessary, drain and refill the fuel tank with fresh fuel to ensure optimal performance when you’re ready to use the outboard again.

3. Maintain Battery Health

If your outboard has a battery, periodically check its charge level and ensure it’s properly stored, especially if you’re storing it for an extended period. If the battery charge is low, consider charging it to prevent damage and ensure it’s ready to start the engine when needed.

4. Prevent Pest Infestation

Check for any signs of pests, such as mice, rats, or insects, that may have made their way into the outboard storage area. Pests can cause damage to wiring, insulation, and other components. Use appropriate pest control measures to keep pests away from your outboard.

5. Maintain Proper Ventilation

Ensure that the storage area has adequate ventilation to prevent the buildup of moisture and mold. If storing the outboard in a closed space, consider using a dehumidifier or moisture-absorbing products to maintain a dry environment.

6. Keep Records

Keep a record of your maintenance activities and inspections, noting any issues or repairs performed during storage. This will help you stay organized and ensure that necessary maintenance tasks are addressed before using the outboard again.

7. Follow Manufacturer’s Recommendations

Always refer to the manufacturer’s guidelines and recommendations for specific maintenance and storage procedures for your outboard. These guidelines are designed to ensure the longevity and optimal performance of the engine.

By monitoring your 4-stroke outboard during storage, you can catch any issues early and address them promptly. Regular inspections, checking the fuel system, maintaining the battery, preventing pest infestation, ensuring proper ventilation, and keeping records will help ensure that your outboard remains in excellent condition throughout the storage period.

Properly Restarting the Outboard After Storage

After a period of storage, it’s essential to properly restart your 4-stroke outboard to ensure smooth and reliable operation. Following these steps will help you restart your outboard and prepare it for use:

1. Remove the Cover

Carefully remove the cover from the outboard, checking for any signs of damage or wear. Inspect the outboard for any debris or pests that may have accumulated during storage.

2. Reinstall the Battery (if applicable)

If you removed the battery during storage, reinstall it and ensure it is connected properly. Check the battery charge level and recharge it if needed.

3. Check Fuel Level and Quality

Inspect the fuel tank to ensure it has the proper amount of fuel. Check for any signs of contamination or degradation, such as water or sediment. If necessary, drain the old fuel and refill the tank with fresh, high-quality fuel.

4. Check Oil Levels

Check the engine oil level and ensure it is within the recommended range. If the oil appears dirty or has an unpleasant odor, consider changing it before starting the outboard.

5. Inspect and Replace Spark Plugs

Inspect the spark plugs and replace them if they appear worn or damaged. Ensure that the spark plugs are properly gapped according to the manufacturer’s specifications.

6. Prime the Fuel System (if necessary)

If your outboard has a primer bulb, squeeze it several times to prime the fuel system and ensure proper fuel flow. This is especially important if you drained the fuel system during storage.

7. Turn On the Ignition

Turn the ignition key to the “ON” position. Allow the engine’s electrical system to power up and check for any warning lights or error indicators. Ensure that all electrical systems, such as the navigation lights and gauges, are functioning properly.

8. Start the Engine

Follow the starting procedure outlined in the manufacturer’s manual to start the engine. Be patient, as it may take a few attempts to prime the fuel system and get the engine running smoothly. Allow the engine to warm up for a few minutes before putting it under load.

9. Monitor Operation

After starting the engine, monitor its operation, listening for any unusual sounds or vibrations. Check for proper water flow from the cooling system and confirm that the propeller is spinning freely.

10. Perform a Test Run

Take your outboard for a test run in a controlled environment such as a calm body of water. Gradually increase the throttle and monitor the engine’s performance. Pay attention to any issues or abnormal behavior and address them promptly.

By following these steps, you can properly restart your 4-stroke outboard after storage and ensure reliable performance when you’re ready to hit the water again. As always, refer to the manufacturer’s recommendations for specific starting and operational procedures for your outboard model.

Conclusion

Properly storing and maintaining your 4-stroke outboard is crucial for its longevity, performance, and reliability. By following the steps in this guide, you can ensure that your outboard remains in excellent condition during periods of storage and is ready for action when you’re ready to hit the water again.

From choosing an appropriate storage location to preparing the outboard for storage, flushing the cooling system, changing the oil and oil filter, fogging the engine, stabilizing the fuel system, removing the battery (if applicable), cleaning and protecting the outboard, covering and securing it, monitoring its condition, and properly restarting it after storage, every step plays a vital role in maintaining the health of your outboard.

Regular inspections, proper cleaning, and the application of protective coatings help prevent corrosion and damage to the outboard’s external components. Flushing the cooling system, changing the oil and oil filter, and fogging the engine protect the internal working parts from corrosion and ensure that the engine is in top condition. Stabilizing the fuel system and removing the battery (if applicable) help prevent fuel issues and electrical system damage. Monitoring the outboard during storage allows you to catch any potential problems early on. Finally, properly restarting the outboard after storage ensures that it starts smoothly and operates efficiently.

Remember to always refer to your outboard’s manufacturer guidelines and recommendations for specific maintenance procedures, as they may differ slightly between models. Following these guidelines will help you maximize the lifespan and performance of your outboard, allowing you to enjoy many seasons of smooth and reliable boating adventures.

By investing time and effort into properly storing and maintaining your 4-stroke outboard, you’ll be rewarded with optimal performance, increased longevity, and peace of mind, knowing that your valuable equipment is well cared for. So, follow these steps, take good care of your outboard, and get ready to embark on unforgettable boating experiences!