How to Sharpen Blades on a Fiskars Reel Mower

A dull reel mower tears grass rather than cutting it, leading to brown tips and a stressed lawn. You can easily restore your Fiskars reel mower to peak performance using a simple backlapping technique that sharpens the blades without requiring disassembly. This process ensures your grass receives a clean, healthy cut every single time.

While reel mowers are renowned for their precision and eco-friendly design, they do require regular maintenance to remain effective. Over time, friction naturally wears down the cutting edges, making the mower harder to push and less efficient. Understanding how to maintain these blades is a vital skill for any homeowner dedicated to lawn care.

In this guide, we provide step-by-step instructions to help you sharpen your mower blades safely at home. We will cover the necessary tools, the correct application of grinding compound, and the specific backlapping motion required for success. Follow these practical tips to keep your mower running smoothly throughout the entire growing season.

Safety First Before You Begin

Before you begin sharpening your Fiskars reel mower, prioritizing safety is essential. Reel mower blades are designed to shear grass with precision, which means they are inherently razor-sharp. Even if your mower is currently cutting poorly, the edges can still cause deep lacerations if handled improperly.

Always wear heavy-duty, cut-resistant work gloves throughout the entire process. These provide a necessary barrier between your skin and the steel blades. Avoid using thin gardening gloves, as they do not offer sufficient protection against the sharp, rotating edges of the reel.

Preparation of your workspace is equally important for a safe experience. Follow these guidelines before you touch any tools:

• Stabilize the mower: Place your mower on a flat, level, and solid surface, such as a workbench or a concrete garage floor. This prevents the unit from tipping or rolling while you are applying pressure to the blades.
• Clear the area: Remove all loose debris, tools, or obstacles from your immediate workspace. A cluttered area increases the risk of tripping or accidentally bumping the mower.
• Establish a safety zone: Because this maintenance involves moving parts and sharp metal, keep children and pets completely out of the area. Ensure no one can inadvertently bump the mower or interfere with your work.
• Disable the drive: If your model has any drive engagement features, ensure they are fully disengaged. While manual reel mowers do not have engines, the reel can still rotate unexpectedly if you push it or if the mower is on an incline.

Taking these precautions ensures that you remain injury-free while restoring your mower to peak performance. Never rush the setup phase; a stable, clear, and controlled environment is the foundation of effective tool maintenance. Once your workspace is secure and your hands are protected, you can proceed with confidence to the sharpening process. Remember, if at any point you feel uncomfortable or unsure about the blade tension, stop immediately and re-evaluate your positioning.

The Backlapping Method Explained

Backlapping is the gold standard for maintaining the precision of your Fiskars reel mower. Unlike traditional rotary mowers that tear grass, reel mowers function like a pair of scissors. For this to work, the reel blades must maintain constant, light contact with the stationary bedknife. Over time, friction dulls these edges, leading to ragged, brown grass tips. Backlapping restores this sharpness without the need to disassemble the mower.

The process involves applying a specialized abrasive grinding compound to the blades and rotating the reel in reverse. As the reel spins backward, the compound acts as a honing agent, grinding the reel blades against the bedknife until both surfaces are perfectly mated and razor-sharp.

To perform this safely and effectively, follow these steps:

• Secure the mower: Ensure the mower is on a flat, stable surface. Disable the drive mechanism so the reel can rotate freely in reverse.
• Apply the compound: Use a medium-grit water-based valve grinding compound. Apply a thin, even bead of the paste along the entire length of each reel blade using a small paintbrush.
• Rotate in reverse: Manually spin the reel backward. You should hear a consistent “hissing” sound as the compound grinds the metal. Continue this motion until the blades feel sharp and the contact is uniform across the bedknife.
• Clean thoroughly: Once finished, it is critical to remove every trace of the grinding compound. Any remaining grit will continue to act as an abrasive during normal use, which can rapidly wear down your blades. Use a damp cloth and a mild degreaser to wipe down both the reel and the bedknife.

By backlapping your Fiskars mower once or twice per season, you ensure a clean, professional-grade cut that promotes lawn health. A sharp mower prevents disease entry points at the grass blade tips, resulting in a greener, more resilient lawn throughout the growing season.

Tools and Materials You Will Need

Before you begin sharpening your Fiskars reel mower, gather all necessary supplies in a clean, well-lit workspace. Proper preparation ensures both your safety and the longevity of your mower’s cutting system. Working in a bright area allows you to monitor the contact between the blades and the bedknife accurately, which is critical for a precise edge.

Collect the following items before starting the process:

• Commercial-grade reel mower sharpening compound: Also known as valve grinding compound, this grit acts as an abrasive to hone the blades as they spin against each other.
• Medium-sized paintbrush: Use this to apply an even, consistent layer of the compound along the length of the reel blades.
• Wrench set: You will need these to adjust the reel-to-bedknife clearance, ensuring the blades make light, even contact during the sharpening process.
• Clean rags or shop towels: Keep these handy to wipe away excess compound, debris, and metal shavings throughout the procedure.
• Sturdy work gloves: Reel mower blades are sharp even when dull. Wear gloves to protect your hands from accidental nicks while handling the reel or adjusting the settings.

Ensure your workspace is stable and flat. If you are working on a workbench, secure the mower so it cannot roll or shift while you are applying the compound or adjusting the tension. Avoid performing this task on grass or dirt, as you will need a clean surface to catch any falling compound or metal filings.

Finally, inspect your mower for any loose hardware or damaged components before applying the abrasive. If you notice significant nicks or deep gouges in the blades, the sharpening compound may not be sufficient; in those cases, professional grinding might be required. Having these tools organized and ready allows you to focus entirely on achieving the perfect cut, ensuring your mower remains a reliable tool for maintaining a healthy, professional-looking lawn throughout the growing season.

Step-by-Step Sharpening Process

Before beginning, ensure your mower is on a stable, flat surface. Disengage the spark plug wire if your model has a motor, or simply ensure the handle is locked in a neutral position. Always wear heavy-duty work gloves to protect your hands from the sharp edges of the reel blades.

To sharpen your Fiskars reel mower, you will need a specialized reel mower grinding compound, which is a grit paste designed specifically for this purpose. Follow these steps to restore your mower’s cutting performance:

1. Apply the compound: Use a small brush or your gloved finger to apply a thin, even layer of the grinding compound along the entire leading edge of each reel blade.
2. Engage the reel: Slowly rotate the reel backward. If your specific model allows, you can use the mower handle to assist with this motion. Continue rotating the reel in reverse so the blades drag against the bedknife.
3. Monitor progress: As you rotate, the grinding compound will act as an abrasive, honing the edge of the blades against the stationary bedknife. Continue this backward motion until you feel the blades spinning smoothly and hear a consistent, light “shaving” sound across the entire length of the blade.
4. Clean thoroughly: This is the most critical step. Once the blades are sharp, use a clean, dry rag to wipe away every trace of the grinding compound from the blades and the bedknife.

Leaving any grit behind can cause significant damage. The abrasive particles will continue to grind away at the metal long after you have finished, leading to premature wear and potential pitting of the blade surfaces. Once the area is completely clean, you may apply a light coat of machine oil to the blades to prevent rust.

If you notice the blades still do not cut grass cleanly after this process, check the alignment of the bedknife. The blades should make light contact with the bedknife to create a “scissor” action, but they should not be so tight that the reel is difficult to turn.

Maintenance Tips and When to Seek Help

Once you have finished sharpening your Fiskars reel mower, the final step is adjusting the bedknife tension. Proper tension is crucial for a clean, professional-looking lawn. To test this, slide a single sheet of paper between the reel blade and the bedknife; if the mower is adjusted correctly, it should slice through the paper cleanly like a pair of scissors. If the paper tears or bends, tighten the adjustment knobs in small, equal increments until you achieve a crisp cut.

While DIY sharpening is effective for routine maintenance, it has its limits. You should seek professional help from a qualified mower repair shop if you notice any of the following issues:

• Deep Nicks: Large gouges in the metal blades cannot be fixed by simple sharpening or backlapping.
• Heavy Corrosion: Extensive rust may have compromised the structural integrity of the steel.
• Bent Components: If the reel or the bedknife is physically warped, the mower will not cut evenly regardless of how sharp the edges are.

In these scenarios, backlapping will not suffice. A professional technician has the heavy-duty grinding equipment necessary to true the reel and restore the blade geometry safely.

To extend the time between sharpening sessions, prioritize preventative maintenance. Grass clippings and sap are acidic and can accelerate corrosion if left on the blades. After every mowing session, take a moment to clear away debris from the reel and bedknife. A quick wipe-down with a dry cloth or a soft brush prevents buildup and keeps your blades performing at their peak.

Finally, always store your mower in a dry environment, such as a garage or shed. Moisture is the primary enemy of sharp blades; keeping your equipment protected from the elements ensures that your Fiskars mower remains a reliable tool for seasons to come. If you ever feel unsure about the mechanical integrity of your mower, it is always safer to consult a professional rather than attempting to force a damaged machine to operate.