How to Sharpen Mower Blades

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Last updated October 28, 2026 · Applies to: lawn mowers from Toro, Husqvarna, Honda, Troy-Bilt, John Deere and Craftsman and others

Step 1: Disconnect the spark plug and remove the blade

Step-by-step instructions for this step are being written.

Mower blade mounting: Crankshaft → Flywheel key → Blade adapter → Blade → Blade boltCrankshaftvertical shaftFlywheel keyshears on impactBlade adapterdrive hubBladeedge + balanceBlade bolttorque to spec
Mower blade mounting. Always disconnect the spark plug lead before touching the blade.

Step 2: Sharpen the cutting edge

Step-by-step instructions for this step are being written.

Mower blade mounting: Crankshaft → Flywheel key → Blade adapter → Blade → Blade boltCrankshaftvertical shaftFlywheel keyshears on impactBlade adapterdrive hubBladeedge + balanceBlade bolttorque to spec
Mower blade mounting. Always disconnect the spark plug lead before touching the blade.

Step 3: Balance the blade

Step-by-step instructions for this step are being written.

Mower blade mounting: Crankshaft → Flywheel key → Blade adapter → Blade → Blade boltCrankshaftvertical shaftFlywheel keyshears on impactBlade adapterdrive hubBladeedge + balanceBlade bolttorque to spec
Mower blade mounting. Always disconnect the spark plug lead before touching the blade.

Step 4: Reinstall and torque the blade bolt

Step-by-step instructions for this step are being written.

Mower blade mounting: Crankshaft → Flywheel key → Blade adapter → Blade → Blade boltCrankshaftvertical shaftFlywheel keyshears on impactBlade adapterdrive hubBladeedge + balanceBlade bolttorque to spec
Mower blade mounting. Always disconnect the spark plug lead before touching the blade.

Brand notes

Brand-specific notes for Toro, Husqvarna, Honda and Troy-Bilt are being researched.

When to take it to a shop

Hand it over if the engine still will not run after the fuel, spark and air checks, if you find metal in the oil or the engine is seized, or if the machine is under warranty (opening it yourself can void it).

Find a lawn mower repair shop near you

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Frequently asked questions

Answers being written: How often should mower blades be sharpened? · Which way does the blade go back on? · Is it better to sharpen or replace a blade? · How much does blade sharpening cost at a shop?