Lena Rivera
Painting an outboard motor cover can be a tricky task, and it is important to prepare the surface before applying paint. In this case, the discussion revolves around whether a Mercury outboard motor cover should be primed before it is painted. Priming is an essential step in the painting process as it helps to ensure that the paint adheres properly to the surface and can enhance the durability and finish of the paint job. In addition, priming can also help to protect the surface from corrosion, which is a common issue with outboard motors, especially in saltwater environments.
Characteristics and Values Table
| Characteristics | Values |
|---|---|
| Priming | Use a plastic primer for plastic outboard motor covers. For bare aluminium surfaces, use zinc chromate primer or etch primer. |
| Paint | Use automotive synthetic enamel or epoxy primer with acrylic urethane single-stage topcoat. |
| Cost | A professional paint job can cost over $1000. A DIY job will cost between $200 and $500, depending on the size of the engine and materials. |
| Preparation | Clean the surface with a mild compound and scuff with a light pad before priming. Mask off certain areas, such as the transom around the clamp brackets, and remove all anodes. |
| Finish | For a superior finish, apply a coat of Mercury Leveler before the final coat of paint dries. |
| Maintenance | An annual touch-up with quality Mercury paint products is recommended to protect the engine and maintain its appearance. |
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What You'll Learn
The importance of priming before painting
Painting an outboard motor cover is a complex task that requires careful preparation and the right materials to ensure a durable and aesthetically pleasing finish. Priming is an essential step in this process, as it serves multiple purposes that contribute to the overall quality and longevity of the paint job.
Priming helps to create a smooth and even surface for the paint to adhere to. By filling in any imperfections, such as scratches or rough spots, the primer creates a uniform base that enhances the paint's ability to bond with the surface. This results in a smoother and more consistent paint finish. Additionally, priming can also help to protect the underlying material of the outboard motor cover. By creating a barrier, the primer prevents corrosion and rust from forming, which could otherwise weaken the structure and shorten the lifespan of the motor cover.
The type of primer used is crucial and depends on the material of the outboard motor cover. For example, plastic primer is specifically designed for use on plastic surfaces, as it includes "flex" agents that prevent the paint from cracking. Similarly, when painting over aluminium, an etching primer is recommended to prepare the surface and ensure the paint adheres properly. Other primers mentioned include epoxy primer, zinc chromate primer, and automotive primer.
The preparation process before priming is also important. Sanding is often necessary to smooth out the surface and create a texture that the primer can adhere to. Additionally, cleaning the surface with a mild compound or boat wash ensures that any grease or grime is removed, creating a clean base for the primer to be applied. Once the primer is applied, it is important to follow the manufacturer's instructions and allow adequate drying time before proceeding with the painting process.
In conclusion, priming is a critical step in painting an outboard motor cover. It ensures a smooth and durable finish, protects the underlying material from corrosion, and enhances the adhesion of the paint. By choosing the right type of primer and properly preparing the surface, one can achieve a professional-looking and long-lasting paint job.
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Choosing the right primer
Painting an outboard motor cover is a task that can be done yourself, but it requires careful preparation and the right materials for a good result. Priming is an important step in the painting process, as it can affect the final finish, performance, and durability of the paint job.
Firstly, it is important to determine whether the surface needs to be primed. If the outboard motor cover has been previously painted and is in good condition, it may not need to be primed. However, if there is exposed metal, corrosion, or other damage, priming is recommended.
When choosing a primer, there are several factors to consider:
- Surface Material: The type of surface being painted is a key factor in choosing the right primer. For metal surfaces, options include zinc chromate primer, zinc phosphate primer, or an all-metal/surface primer. For wooden surfaces, a latex or oil-based primer can be used, depending on the condition of the wood. If the wood is stained or unpainted, an oil-based primer is recommended. If the wood is new or unstained, a high-quality latex primer can be used.
- Surface Condition: The condition of the surface is also important. If the surface is rusty or stained, a corrosion-resistant or stain-blocking primer should be used. For surfaces with tannin, water, grease, or smoke stains, an alkyd (oil-based) primer is recommended. If the surface has been previously painted, it is important to identify the type of coating used (acrylic vs. alkyd) to select the appropriate primer.
- Environment: Consider whether the primer is for an indoor or outdoor surface. Indoor primers are typically designed to block stains and odours, while outdoor primers are designed to protect surfaces from mildew, cracking, and erosion. If the primer is for both indoor and outdoor surfaces, choose an interior/exterior primer.
- Topcoat: While it is not necessary to use the same paint as the final topcoat, it is recommended to use a similar colour to ensure an even finish. Most acrylic and oil-based primers will accept both acrylic and oil-based topcoats.
- Zinc Chromate Primer: Suitable for metal surfaces and can be applied using squirt bombs.
- Zinc Phosphate Primer: A high-performance option for both wood and metal surfaces, offering excellent rust inhibition.
- PPG DP Epoxy Primer: Recommended for outboard motor covers, followed by a PPG Concept acrylic urethane single-stage topcoat.
- Automotive Filler Primer: Used to check for rough spots and areas that need to be resanded before painting.
- Automotive Sealer Primer: Applied before the factory enamel for a smooth finish.
- Acrylic Primer: Suitable for almost any surface, including wood, laminate, and metal (unless there is rust). Offers easy application and water clean-up.
- Alkyd (Oil-Based) Primer: Recommended for bare wood substrates and covering stains. Provides superior stain blocking and long-lasting adhesion.
- Latex Primer: A versatile option for porous surfaces such as drywall, brick, plaster, and stucco.
- Stain-Blocking Primer: Specifically designed to cover stains, such as Zinsser Cover Stain primer.
- Mildew-Resisting Primer: Ideal for surfaces that need to be prepped for wallpaper.
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Preparing the surface
Before you start painting, it is important to prepare the surface of your Mercury outboard motor cover. This process will ensure that the paint adheres properly and that the finish is smooth and durable. Here are the steps you should follow:
Clean the surface: Start by thoroughly cleaning the outboard motor cover to remove any dirt, grease, or grime. You can use a mild detergent or a boat wash product specifically designed for this purpose. Make sure to rinse and dry the surface thoroughly before moving on to the next step.
Scuff the surface: Once the surface is clean, use a light abrasive pad, such as Scotch-Brite, to scuff the surface. This step will create a rough texture on the cover, which will help the primer and paint adhere better. Be sure to scuff all areas that will be painted, including any exposed metal areas.
Mask off any areas you don't want to paint: Mask off any areas that you don't want to paint, such as the transom around the clamp brackets, power trim rams, and steering components. This will help ensure a clean, professional-looking finish.
Sand the surface: Depending on the condition of the cover, you may need to sand it to smooth out any imperfections or rough spots. If there are existing coats of paint, you may be able to get away with a light sanding. However, if there is significant corrosion or damage, you may need to sand down to the bare metal. Use progressively finer grit sandpaper, ending with a smooth finish.
Prime the surface: Choose a suitable primer for the surface you are painting. For bare metal surfaces, an etching primer or a zinc chromate primer is recommended. If you are painting over plastic, be sure to use a plastic primer to prevent cracking. Apply the primer according to the manufacturer's instructions, typically using a spray or a brush. Allow the primer to dry completely before proceeding to the next step.
Apply filler (if needed): If there are any dents or deep scratches on the surface, you may need to use an automotive filler to smooth out the surface. Apply the filler according to the manufacturer's instructions and allow it to dry completely. Once dry, sand the repaired areas smooth and blend them into the surrounding surfaces.
By following these steps, you will properly prepare the surface of your Mercury outboard motor cover for painting, ensuring a professional-looking and long-lasting finish.
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Painting techniques
Painting an outboard motor requires careful preparation and the right materials to ensure a quality finish. Firstly, it is important to note that painting the outboard motor cover may void the warranty, so it is recommended to consult the manufacturer's specifications and guidelines before making any changes.
Before painting, ensure the surface is clean and free of any corrosion. If there is corrosion, treat it with a product such as ALUMA-PREP aluminum cleaner/conditioner to neutralize it. If there are any repaired areas, sand them smooth with progressively finer grit paper, ending with a 600- or 800-grit paper. This will help create a smooth surface for the paint to adhere to. Wipe down the surface to remove any dust or debris before applying primer.
Priming is an important step in the painting process, as it helps the paint adhere better and provides a more durable finish. Mercury offers a Light Gray Primer that can be used to prime the outboard motor cover. Follow the instructions on the can and apply several thin, even coats rather than a single heavy coat. Allow the primer to dry completely before lightly scuffing it with a medium-grit abrasive pad to promote adhesion for the paint.
When choosing a paint, it is important to select a high-quality, marine-grade paint that is specifically designed for use on outboard motors. Mercury offers a range of factory-matched paint colors, including Phantom Black, Verado Silver, Cold Fusion White, and Warm Fusion White and Pearl. These paints are formulated with UV blockers to protect the motor from sun exposure. Apply the paint using full, sweeping motions, holding the can about 8 to 10 inches from the surface. Allow the paint to dry between coats and consider applying a clear coat for added durability and shine.
For a more durable finish, consider using a 2-part paint system, such as Imron Black, which is harder and more resistant to chipping. However, when using a 2-part paint system, be sure to use a respirator and ensure adequate ventilation during application.
Additionally, it is important to mask off any areas that should not be painted, such as the transom around the clamp brackets, power trim rams, steering components, and anodes. Proper masking will help ensure a clean, professional-looking finish.
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The benefits of a professional paint job
Painting a mercury outboard motor cover requires careful preparation and the use of suitable materials. While some people choose to paint their outboard motors themselves, there are several benefits to obtaining a professional paint job.
Firstly, professional painters have the experience and expertise to deliver a high-quality paint job. They understand the importance of surface preparation, such as priming and sanding, to ensure proper adhesion and a smooth finish. This preparation process helps prevent issues like paint peeling, blistering, or flaking. They also have the skills to execute intricate designs and ensure perfect lines, without roller marks or brush lines.
Secondly, professionals can guide you in selecting the right paint and tools for the job. They have access to higher-quality paints with UV inhibitors, which can prevent colour fading. Additionally, they bring their own specialised tools, such as brushes, rollers, and spray guns, that are suited to the specific paint being used. This results in a more durable and long-lasting paint job.
Thirdly, hiring a professional painter can save you time and hassle. They can complete the work much faster than a DIY project, minimising the disruption to your routine. Moreover, they handle the cleanup process, ensuring your space is left tidy and pristine.
Lastly, professional painters often provide warranties or guarantees for their work. This means that if there are any issues with the paint job, they will bear the cost of fixing it. This provides peace of mind and protects you from potential financial liabilities.
Overall, while a professional paint job may come with a higher upfront cost, the benefits of expertise, quality, time savings, and warranties make it a worthwhile investment for many.
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Frequently asked questions
It is recommended to use a Mercury Light Gray Primer for the Mercury outboard motor cover. Other options include PPG DP Epoxy primer, etching primer, and self-etching primer.
First, remove the propeller and cover the prop shaft. Then, prime the area with Mercury Light Gray Primer and follow the instructions on the can. After the primer is dry, scuff lightly with a medium-grit abrasive pad. Do not sand through the primer. Next, apply the appropriate Mercury paint colour, holding the can 8 to 10 inches from the surface. Apply several thin, even coats rather than a single heavy coat.
It is generally recommended to prime the surface before painting to achieve a better finish and promote adhesion. However, if you have only sanded the factory paint and not exposed the bare metal, you can paint directly without priming.
It is recommended to use Mercury Precision Care® paint products, which are specially formulated for the marine environment and include UV blockers. Other options include enamel paint, acrylic lacquer, and two-part paint such as DuPont Imron.
