Winterizing your boat is a crucial aspect of boat ownership, particularly in regions with harsh climates. A key question that arises is whether you can leave your outboard motor submerged in the water throughout the winter months. The answer isn’t a simple yes or no; it depends on various factors, including your location, the type of water (freshwater vs. saltwater), the specific model of your outboard motor, and the measures you take to protect it.
Understanding the Risks of Leaving an Outboard in the Water
Leaving an outboard motor in the water over winter poses several potential risks. These risks stem from the properties of water at freezing temperatures and the corrosive nature of certain types of water. Understanding these potential problems is the first step in making an informed decision about your winterization strategy.
The Perils of Freezing Temperatures
Water expands when it freezes. This seemingly simple fact can cause significant damage to an outboard motor left submerged. If water remains within the engine’s cooling system, it can freeze and expand, cracking the engine block, cylinder head, or other vital components. These cracks are often irreparable and can lead to costly repairs or even the need for a complete engine replacement. Completely draining the engine of water is critical in preventing freeze damage.
Ice formation around the lower unit of the outboard can also cause problems. The expanding ice can exert pressure on the seals, potentially leading to leaks and water intrusion into the gearcase. This can result in corrosion and damage to the gears and bearings.
The Corrosive Effects of Water
Even if freezing isn’t a concern, the water itself can cause corrosion. Saltwater is particularly corrosive and can accelerate the deterioration of metal parts. Freshwater also contains minerals and impurities that can contribute to corrosion over time. Regular flushing with freshwater and the application of corrosion inhibitors are essential for protecting your outboard motor from corrosion.
Crevices and hard-to-reach areas are particularly vulnerable to corrosion. Keeping your outboard clean and well-protected is crucial for maximizing its lifespan.
Marine Growth and Fouling
Submerged outboards are susceptible to marine growth, such as barnacles, algae, and other organisms. These organisms can attach themselves to the lower unit and other submerged parts, increasing drag and reducing fuel efficiency. They can also clog water intakes, leading to overheating and engine damage. Applying anti-fouling paint to the lower unit can help prevent marine growth.
Regular cleaning of the outboard is necessary to remove any existing marine growth. Neglecting this can lead to significant performance issues.
Factors to Consider Before Leaving Your Outboard Submerged
Before making the decision to leave your outboard motor in the water over the winter, carefully consider the following factors:
Water Type: Freshwater vs. Saltwater
The type of water your boat is in makes a huge difference. Saltwater is much more corrosive than freshwater, significantly increasing the risk of damage to your outboard motor. If your boat is in saltwater, the risks associated with leaving the outboard submerged are substantially higher.
Freshwater presents less of a corrosion risk, but it still poses the threat of freezing damage. Careful winterization is still necessary to protect your engine.
Climate and Freezing Conditions
The severity of the winter climate is another crucial consideration. If you live in an area with consistently freezing temperatures, the risk of freeze damage is high. In warmer climates where freezing is rare, the risk is lower, but corrosion and marine growth remain concerns.
Consider the typical temperature fluctuations in your area. Even occasional freezing temperatures can cause damage if water is present in the engine.
Outboard Model and Materials
Some outboard models are more resistant to corrosion and freezing than others. Older models may be more susceptible to damage due to wear and tear on seals and other components. Newer models often incorporate more corrosion-resistant materials and improved drainage systems.
Consult your outboard motor’s owner’s manual for specific recommendations regarding winter storage. The manufacturer’s guidelines should be followed closely to ensure proper protection.
Winterization Procedures Performed
The extent to which you winterize your outboard motor plays a major role in whether it can safely be left submerged. Proper winterization involves draining all water from the engine, flushing with antifreeze, lubricating critical components, and applying corrosion inhibitors. A properly winterized outboard is far more likely to survive the winter unscathed.
If you haven’t properly winterized your outboard, leaving it submerged is a risky proposition. The potential for damage is significantly higher.
Steps to Take if You Leave Your Outboard in the Water
If, after careful consideration, you decide to leave your outboard motor in the water during the winter, take the following steps to minimize the risk of damage:
Thorough Flushing with Freshwater
Before winterizing, thoroughly flush the engine with freshwater to remove any salt, minerals, or debris. This is particularly important for outboards used in saltwater. Use a flushing attachment or a large tub of freshwater to ensure that the entire cooling system is flushed.
Run the engine while flushing to ensure that the freshwater circulates throughout the system. Pay close attention to the water exiting the engine to ensure that it is clear and free of debris.
Draining All Water from the Engine
Drain all water from the engine’s cooling system. Consult your owner’s manual for the location of drain plugs. Remove the plugs and allow all water to drain completely. Tilt the engine up and down to help remove any trapped water.
In some cases, you may need to use compressed air to blow out any remaining water from the cooling passages. Be careful not to use excessive pressure, as this could damage the engine.
Adding Antifreeze to the Cooling System
Once the water is drained, add marine-grade antifreeze to the cooling system. This will protect against freezing and corrosion. Consult your owner’s manual for the recommended type and concentration of antifreeze.
Run the engine briefly to circulate the antifreeze throughout the cooling system. This will ensure that all internal components are protected.
Greasing and Lubricating
Grease all moving parts and lubrication points, including the steering cable, throttle cable, and shift cable. This will help prevent corrosion and keep these parts moving freely. Use a marine-grade grease that is specifically designed for use in wet environments.
Check the gearcase oil and replace it if necessary. Water in the gearcase can cause significant damage.
Applying Corrosion Inhibitors
Spray all exposed metal surfaces with a corrosion inhibitor. This will help protect against rust and corrosion. Pay particular attention to the lower unit and any areas that are prone to corrosion.
Reapply corrosion inhibitors periodically throughout the winter, especially after periods of rain or snow.
Consider an Outboard Motor Cover
A properly fitted outboard motor cover can provide additional protection from the elements. The cover will help keep out rain, snow, and sunlight, which can all contribute to corrosion and damage.
Choose a cover that is made from breathable material to prevent moisture buildup underneath. Make sure the cover fits snugly to prevent it from being blown off by the wind.
Regular Inspections
Even after taking these precautions, it’s important to inspect your outboard motor regularly throughout the winter. Check for any signs of leaks, corrosion, or damage. If you notice anything unusual, take action immediately to address the problem.
The Alternative: Removing and Storing Your Outboard
The safest option for winterizing your outboard motor is to remove it from the boat and store it in a dry, protected location. This eliminates the risk of freezing, corrosion, and marine growth. While it requires more effort, it provides the best possible protection for your investment.
Benefits of Removing Your Outboard
- Eliminates the risk of freeze damage.
- Reduces the risk of corrosion.
- Prevents marine growth.
- Allows for thorough inspection and maintenance.
- Deters theft.
Storing Your Outboard Properly
- Thoroughly flush the engine with freshwater.
- Drain all water from the engine.
- Grease and lubricate all moving parts.
- Apply corrosion inhibitors.
- Store the outboard in a vertical position to prevent oil leaks.
- Cover the outboard with a breathable cover.
- Store the outboard in a dry, protected location.
Making the Right Decision for Your Outboard
Deciding whether to leave your outboard motor in the water over the winter is a complex decision that depends on a variety of factors. Carefully weigh the risks and benefits, considering your location, the type of water, the model of your outboard, and the measures you are willing to take to protect it.
If you are unsure, it’s always best to err on the side of caution and remove your outboard for the winter. While it may require more effort, it will provide the best possible protection for your investment and ensure that your outboard is ready to go when boating season arrives. A little preventative maintenance goes a long way.
Question 1: What are the primary risks of leaving an outboard motor in the water during winter?
Leaving an outboard motor submerged in water throughout the winter months presents several significant risks. The most prominent is the potential for corrosion and damage from freezing temperatures. Water expands when it freezes, and if water gets trapped inside the engine block or cooling system, this expansion can cause cracks, fractures, or even complete engine failure. Saltwater environments exacerbate these issues, as saltwater is significantly more corrosive than freshwater, leading to accelerated deterioration of metal components.
Furthermore, prolonged submersion can promote marine growth on the lower unit of the motor. This includes barnacles, algae, and other organisms that can impede water flow, reduce performance, and ultimately necessitate costly cleaning and repairs. Electrical connections can also suffer from corrosion due to constant exposure to moisture, potentially leading to starting problems or other electrical malfunctions. The combination of freezing temperatures and marine growth creates a perfect storm for engine damage.
Question 2: Does the type of water (freshwater vs. saltwater) impact whether I can leave my outboard in the water?
Yes, the type of water significantly impacts the decision to leave your outboard motor submerged during winter. Saltwater is considerably more corrosive than freshwater. The higher salt concentration accelerates the oxidation process, leading to rust and deterioration of metal components within the engine. This is especially detrimental to the lower unit, propeller, and cooling system, potentially requiring expensive repairs or even engine replacement.
Freshwater environments pose less of a corrosion risk, but the danger of freezing still remains a major concern. While freshwater may not corrode as quickly, if water gets trapped inside the engine and freezes, it will expand and can cause significant damage to the engine block and internal components. Regardless of the water type, preventative measures and proper winterization are crucial.
Question 3: What winterization steps can I take to minimize damage if I must leave my outboard in the water?
If leaving your outboard motor in the water during winter is unavoidable, thorough winterization is essential to minimize potential damage. Start by flushing the engine with freshwater to remove any residual saltwater. Add fuel stabilizer to the fuel tank to prevent fuel degradation and varnish buildup. Fogging the engine cylinders with fogging oil will protect internal components from corrosion.
Next, disconnect the fuel line and run the engine until it stalls, ensuring that the carburetor or fuel injectors are empty. This prevents fuel from sitting and potentially causing clogs or corrosion. Also, consider applying a protective coating of marine grease to exposed metal parts, such as the propeller shaft and steering linkages. Finally, check and maintain the engine’s anodes to help reduce galvanic corrosion.
Question 4: Are there any situations where it’s generally acceptable to leave an outboard in the water over winter?
There are limited circumstances where leaving an outboard motor in the water over winter might be acceptable, but these scenarios still require careful consideration and preparation. In regions with consistently mild winters where temperatures rarely drop below freezing, the risk of water freezing inside the engine is significantly reduced. However, this doesn’t eliminate the threat of corrosion or marine growth.
Another potential scenario involves marinas with heated docks or bubbler systems that prevent water from freezing around the boat and motor. These systems can help mitigate the risk of freeze damage, but regular monitoring is still necessary to ensure their effectiveness. Even with these safeguards, proper winterization procedures should still be followed to provide the best possible protection against corrosion and marine growth.
Question 5: How often should I check on an outboard left in the water during winter?
Regular monitoring of an outboard motor left in the water during winter is crucial for identifying potential problems early and preventing significant damage. Ideally, you should check on the motor at least once a week, if possible. This allows you to observe any signs of water leaks, unusual corrosion, or excessive marine growth.
During these checks, pay close attention to the waterline around the lower unit. Look for any evidence of ice formation, even small amounts, as this could indicate that water is freezing inside the engine. Also, visually inspect the propeller and surrounding areas for any signs of marine growth accumulation. If you notice any issues, address them immediately to prevent further deterioration.
Question 6: What specific signs indicate that my outboard motor has been damaged by winter exposure?
Several signs can indicate that your outboard motor has sustained damage from winter exposure. One common sign is difficulty starting the engine in the spring. This could be due to corrosion in the electrical system, fuel system problems, or internal engine damage. Visual inspection may reveal cracks in the engine block or lower unit casing.
Another indicator is excessive corrosion or rust on exposed metal parts, particularly around the propeller, lower unit, or steering components. Water leaking from the engine block or lower unit is a clear sign of internal damage, potentially caused by freezing. Additionally, if you notice decreased performance or unusual noises during operation, it could indicate that internal components have been damaged by corrosion or freezing.
Question 7: What are the alternatives to leaving my outboard motor in the water during winter?
The most recommended alternative to leaving your outboard motor in the water during winter is to remove it and store it properly indoors. This eliminates the risks associated with freezing temperatures, corrosion, and marine growth. Storing the motor in a dry, sheltered location, such as a garage or shed, will protect it from the elements and significantly extend its lifespan.
If removing the motor is not feasible, consider dry storage options at a marina. Many marinas offer winter storage services where they lift boats out of the water and store them on land. This option provides the same benefits as indoor storage while also ensuring that your boat and motor are protected from harsh winter conditions. These alternatives require upfront costs, but can save money on costly repairs in the long run.