How to Sharpen Blades on a Zero Turn Mower

Are you in need of a solution on how to sharpen blades on a zero turn mower? 

Don’t worry. On this web page, we will show you an easy step-by-step guide to help you with the sharpening tasks.

Don’t feel intimidated in case you have never done this before. This guide doesn’t make use of any sophisticated tools or any particular skill set.

Just good old handy garage tools like a car jack, wrenches, and sharpening file. So take a deep breath and follow the instructions.

Why Do You Need to Sharpen Blades on a Lawnmower?

Before we start, let us enlighten you on the aspects of blade sharpening. Why and when do you need to sharpen your zero-turn mower blades?

Well, lawnmower blades do get dull after a year of regular use. That’s when you start to see tear marks and uneven cuts all over the grass. And, to be honest that scenario never looks pretty.

So, the rule of thumb is to check every year. But in case the mower belongs to a large institution and needs to cover a large area regularly, the blade will lose sharpness a lot faster.

Therefore, it would be ideal to inspect after a couple of months to maintain consistency.

How to Sharpen Blades on a Zero Turn Mower? Step by Step:

This guide works on most lawnmowers. Nevertheless, you should always read the user’s manual first to understand a bit better how things work in your particular model.

There could be a convenience latch to release certain parts that will aid in disassembling the blades.

Zero-turn mowers generally come with three blades in total. That means you need to remove each blade separately and carefully.

After that, we will use a standard sharpening file or power drill with a sharpening stone. This work can be dangerous if you lack attention and safety precautions.

Things you will need

  • Carjack
  • Wrenches
  • Small wood pieces
  • Protection goggles
  • Safety gloves

Preparing Workspace

Working with any power tool always poses a high risk of accidents. So it would be a great idea to perform these types of work in an isolated place if you lack a dedicated workshop/garage.

Either way, make sure there are no children or pets around for interruption.

Besides that, don’t forget to equip yourself with proper safety gear. Fetch all the necessary tools that we mentioned above.

Every successful maintenance work greatly depends on pre-planning which makes the work less stressful.

Lifting the Mower Deck

Unlike other walk-behind or single-blade-riding lawnmowers, the zero-turn lawnmower is substantially heavy. It’s because the machine is designed mostly for professional work.

That said, use a car jack to cautiously lift the front deck as you will be accessing the blades underneath.

One important thing, remove the spark plug from the engine to prevent accidental ignition. Also, use additional support if you feel one jack is not enough.

Disassembling the Blades

Now comes the important part. After lifting the front deck, you will see three blades side by side. Jam a small piece of wood with each blade to constrain movement.

This is the best time to take photos of the blade's configuration for ease of reassembly.

While the wood piece restricts blade movement, place your wrench on the spindle bolt and turn anticlockwise.

After a couple of turns, the bolt will come loose. Do the same thing with the next two blades.

Sharpening the Blades

I believe you have successfully removed all the blades by now. Your next step will be preparing those blades for sharpening.

You can do that by inspecting each blade for gunk, rust, or metal chipping. If there is a significantly large chipped portion or you see cracks on the physique, it's best to change the whole blade.

For sharpening, you can use any sharpening method, whether it is a hand file or a sharpening stone on a power tool. The trick here is to follow the original angle.

Slowly work on one side then move to the other side. Try to make the same pass on each side for a uniform finish.

Reassembling the Blades

After you have done sharpening the blades, it’s time to reassemble. Now you can use those pictures you have taken earlier to validate you are installing the blades in the right way.

It’s also important to balance out those blades before attaching them to the mower.

Just hang those blades from the middle or use a nail to determine both sides are equally weighted. If it’s not, file some more on the heavy side to lose weight.

Final Thoughts

Every lawn mower owner dreams of the persistent cutting result. As blades have diminishing sharpness, knowing how to sharpen blades on a zero-turn mower helps a lot.

We hope you have found the appropriate information in this article and are able to take advantage of that. 

Now the only question remains, is your zero-turn lawn mower ready for the next cutting season?

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