Sofia Martinez
The use of plastic on mower decks is a topic of debate among lawn care enthusiasts and professionals. Some argue that plastic decks are superior due to their ease of cleaning, flexibility, and longevity. Others express concerns about the potential for melting, cracking, and warping. The material used for mower decks, whether plastic or metal, requires maintenance to prevent rust and corrosion, and to ensure optimal performance. While some opt for plastic coatings or liners, others prefer steel or alloy decks for their durability. The choice between plastic and metal mower decks ultimately depends on factors such as lawn conditions, frequency of use, and personal preferences.
| Characteristics | Values |
|---|---|
| Plastic on mower deck needed? | Plastic is not necessary but can be used to line the inside of a steel deck to provide a resilient surface. |
| Pros of plastic | Plastic is easy to clean, flexes on impact, and does not rust. |
| Cons of plastic | Plastic can melt, crack, and warp more easily than metal. |
| Alternative materials | Polycarbonate, fibreglass, alloy, xenoy, stainless steel, and bare polished steel. |
| Protective coatings | WD-40 PTFE Dry, Fluid Film, Mo-Deck, Clean Machine (with Teflon), diesel engine oil, slick plate, galvacoat, graphite coatings (Slip Plate and EZ Slide). |
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What You'll Learn
Pros and cons of plastic mower decks
Plastic mower decks have gained popularity in recent years due to their affordability, ease of maintenance, and lightweight nature. One of their standout advantages is their resistance to rust and corrosion, which makes them a good option in damp conditions. Plastic decks are also quieter than their metal counterparts, making them a good choice for those with noise restrictions or sensitive ears.
However, plastic mower decks may not offer the same level of durability as steel or aluminum decks. They are susceptible to cracking or breaking under heavy impact or extreme temperatures. Additionally, plastic decks may not provide the same stability and cutting performance as metal decks.
Another consideration is the potential for moisture to become trapped between a plastic liner and a steel deck, which could cause problems over time. This issue can be mitigated by ensuring proper maintenance and cleaning, particularly in areas that are frequently damp.
Some manufacturers, such as Honda, have developed proprietary polymer materials for their mower decks, like NeXite, which offer improved resistance to cracking and brittleness compared to traditional polymers. These advanced polymers provide a lightweight and highly resistant alternative to steel decks, although some users still prefer the durability and strength of steel.
Ultimately, the choice between a plastic or metal mower deck depends on factors such as budget, mowing needs, and personal preferences. Plastic decks offer a low-maintenance and affordable option, while metal decks, like steel or aluminum, provide greater durability and stability but may require more upkeep to prevent rusting.
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Non-plastic alternatives
While plastic mower decks are popular, there are non-plastic alternatives available. One option is to use a cast alloy deck, which can be long-lasting if properly maintained. For instance, one user reported using a Hayter mower with a cast alloy deck for over 25 years. However, it is important to avoid contact with lawn fertiliser to prevent the alloy deck from rotting. Another alternative is to use a steel deck, which can be welded to repair any damage.
In terms of coatings for the underside of the mower deck, there are several non-plastic options available. One user recommended using WD-40 PTFE Dry, which can be applied to any metal or plastic surface and helps protect against rust and corrosion. Other users have suggested using non-stick coatings like Fluid Film, Mo-Deck, cooking oil, PAM, or graphite coatings like Slip Plate and EZ Slide. However, these coatings may need to be reapplied frequently and may not completely eliminate sticking.
Some users have also suggested using fibreglass to repair and reinforce mower decks. Fibreglass can be moulded to shape and is easy to apply, but it may not be durable enough for areas with high wear and vibration. Another option is to use a material called Xenoy, which is similar to plastic but much stronger and is warrantied for a full 5 years.
Overall, while plastic mower decks are common, there are several non-plastic alternatives available, including cast alloy, steel, and Xenoy decks, as well as various coatings and reinforcements.
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Rust prevention
Rust can be a major issue for mower decks, with mowers rusting out rather than wearing out. Grass clippings, dirt and debris can abrade the paint on the underside of the deck, exposing the metal and leading to rust. This can be made worse by wet grass clippings, which can hold in moisture, causing further rust. Therefore, rust prevention is key to extending the life of your mower.
Firstly, it is important to keep the underside of your mower deck clean and free of grass clippings, which can cause rust. You can do this by hosing the underside of the mower with water after use, and raising the front of the mower to get better access to the deck. If needed, use a stiff-bristled brush and water to remove any remaining grass. You can also use a scraper to remove stuck-on grass, but make sure it is plastic so you don't scratch the paint. Pressure washing can also be an effective way to remove stuck-on grass.
Once the mower deck is clean, you can apply a rust inhibitor or rust preventative coating to shield the surface and prevent rust. There are a variety of products available for this purpose, including:
- WD-40 PTFE Dry: a synthetic lubricant that forms a protective layer on the surface of your mower deck, shielding it from rust and corrosion.
- Amsoil: a waxy coating that can last a couple of years.
- Rustoleum: a rust converter that seals the rust and turns it into a paintable surface.
- KBS RustSeal: a rust preventative coating that seals the lawn mower deck to prevent new rust from forming.
- Por 15: a product that can be used to undercoat the deck to prevent additional rust.
In addition to these products, some people also recommend using motor oil, vegetable oil, or sunflower oil to prevent rust. However, these may cause grass to stick to the deck. It is also recommended to avoid mowing when the grass is wet, as this can cause grass clippings to stick to the deck and lead to rust.
By following these steps and taking preventative measures, you can effectively prevent rust on your mower deck and extend the life of your mower.
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Non-stick coatings
There are several non-stick coating products available for the underside of a mower deck to reduce or eliminate the sticking and clumping of wet grass. While some coatings may provide temporary relief, it is important to note that, over time, any coating will deteriorate due to the debris, grass, and dirt flying around under the deck.
Mo-Deck Non-Stick Mower Blade/Deck Spray is a popular product that claims to dramatically reduce the adhesion of grass clippings and deposits to the mower deck. It is easy to apply, convenient for larger deck areas, and can extend the operating life of the mower. However, some customers have reported that grass still sticks to the deck even after using Mo-Deck.
Other products mentioned include Fluid Film, cooking oil, PAM, Clean Machine (with Teflon), and various types of paint, such as Rustoleum Professional High-Performance Spray Paint, POR15, and Redline Shine (a ceramic coating). Some users have also suggested using a hose connector or pressure washer to clean the underside of the mower deck instead of relying solely on coatings.
While these coatings may provide some level of protection and non-stick properties, it is important to manage expectations. As one user noted, the "Holy Grail" of lawn mowers would be a coating that can withstand the "sandblasting effect" under the mower deck, but such a coating may not yet exist. Regular cleaning and maintenance of the mower deck are still essential, regardless of the coating used.
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Repairing plastic mower decks
Repairing a plastic mower deck is a straightforward process that can be done at home. It is important to note that the repair process may vary depending on the type of lawnmower and the nature of the damage. Here is a step-by-step guide on how to repair a plastic mower deck:
Step 1: Remove the Deck
Start by removing the mower deck and the spark plug. This will allow you to access the deck and inspect it for any damage, such as cracks, holes, or rust.
Step 2: Inspect and Clean the Deck
Once the deck is removed, carefully inspect it for any cracks, holes, or rust. If there are any cracks or holes, mark their locations for repair. Clean the deck surface using a hose or pressure washer to remove any dirt, debris, or grass buildup. A clean surface will make it easier to work on and ensure that any repairs or treatments adhere properly.
Step 3: Repair Cracks and Holes
To repair cracks or holes in a plastic mower deck, you can use plastic epoxy or a similar product. Drill small holes on both sides of the cracks to prevent them from spreading further. Fill the cracks and holes with the epoxy, ensuring that it is level with the surrounding surface. Allow the epoxy to dry thoroughly, usually for about 24 hours, before proceeding to the next step.
Step 4: Paint and Protect
After the epoxy has dried, it is important to protect the repaired areas with paint. Choose a paint that is suitable for plastic surfaces and follow the manufacturer's instructions for drying times. Some paints may require a primer to be applied before painting to ensure better adhesion and protection. Additionally, consider using a rust-proofing paint or treatment to prevent future rust buildup.
Step 5: Reassemble the Deck
Once the paint has dried completely, reassemble the mower deck by attaching it back to the mower. Ensure that all fasteners and mounting hardware are secure. Check the belt tension and pulley alignment to ensure the deck is properly installed.
Additional Tips:
- Regular maintenance and cleaning of your mower deck can help prevent rust and corrosion.
- Consider using products like WD-40 PTFE Dry to protect your mower deck from rust and simplify cleanup.
- If you're repairing a rusty mower deck, you can use products like JB Weld to fill holes and sanded rusty areas, followed by a coat of rust-proofing paint.
- For more extensive repairs, you may need to replace certain components, such as the blades or engine parts.
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Frequently asked questions
Plastic mower decks are made of xenoy, a substance similar to plastic but much stronger.
Plastic mower decks are easy to clean, flexible on impact, and resistant to rust.
Plastic mower decks may be more susceptible to melting, cracking, and warping than metal mower decks.
Yes, you can coat the underside of your mower deck with plastic or other materials like fibreglass, polycarbonate, or steel to protect it from rust and corrosion. However, keep in mind that any lining could cause problems if moisture gets trapped.
Yes, products like WD-40 PTFE Dry can be applied to metal or plastic mower decks to protect them from rust and corrosion, simplify cleanup, and extend their longevity.
