Bad Boy Mower Blade Removal: Quick & Easy Guide

Bad Boy mowers enjoy an excellent reputation, but even the best lawn tractors require maintenance. From all the parts of a riding mower, the blades are the most abused. After hours of cutting grass, they will likely become dull. When this happens, removing the Bad Boy mower blades to sharpen them is paramount. If you’ve never had a riding lawn mower before and don’t know how to do it, this guide is for you.

The Bad Boy mower blade removal process isn’t hard, but you must follow specific steps for successful removal and maintenance. One of the most important things is securing the blades from moving for an easier unfastening of the mounting bolt and preventing accidents. 

How To Remove Blades On A Bad Boy Mower

Whether you want to sharpen your mower’s blades or replace them with a new set, you must first learn how to remove them. 

Things You’ll Need

You can remove the mower blades without taking off the deck by raising the mower’s rear. Here are the things you’ll need: 

  • Floor jacks or wheel ramps or a riding mower lift
  • 1/2-inch breaker bar 
  • 15/16-inch socket wrench
  • 3/8-inch ratchet 
  • 3/4-inch socket wrench
  • Mallet 
  • Block of wood

1. Raise the mower’s back

Depending on the hardware you use, drive the mower onto the wheel ramps (in reverse mode), push it onto the floor jacks, or lift its rear with the riding mower lift. Once the rear is raised, block the front wheels to prevent it from rolling forward and engage the brake

If you don’t have the hardware necessary to raise the mower, know that you can access the blades by removing the deck.

2. Remove the first blade 

Start on one side of the mower and remove the first blade. To do that, you have to block the blade with a block of wood. Connect the 15/16-inch socket to the breaker bar and place it on the bolt

Turn the bolt counterclockwise while applying enough amount of torque. If the bolt is too tight, hit the breaker bar with the mallet until it gives in. Once it comes loose, remove it by hand and take the blade off. 

3. Remove the second (and third) blade 

Repeat the steps above to remove the second blade. Some Bad Boy mowers have a three-blade deck. If that’s your case, follow the same steps to remove the third blade, too.

Tips

  • An impact wrench can make it easier to remove the bolts compared to a breaker bar; thus, if you have an impact wrench, don’t hesitate to use it.
  • Loosening tight bolts can be challenging, but you can make things easier by spraying some WD-40 on the fasteners before turning. 
  • After reinstalling the blades, make sure to re-torque the bolts to 90-110 ft.-lbs. Hand tight bolts can become loose as you’re mowing due to vibrations. 
  • The blade removal process is similar on all Bad Boy mowers, but you should always check the owner’s manual for specific instructions before proceeding.

Why Is The Bolt Stuck On My Bad Boy Mower Blade?

Trying to remove your Bad Boy’s blades only to notice they won’t budge is frustrating, but bolts can get stuck for a variety of reasons. Improper tightening is perhaps the most common issue. While the bolts must be tight after reinstalling the blades, they don’t have to be too tight, or you’ll have trouble taking them off.

Not using enough force when turning them could be another problem. Ideally, you should use an impact wrench to remove them. A bolt that needs greasing can be removed in the same way.

Rusted or stripped bolts can also get stuck. Bolt stripping happens when the bolt’s head gets rounded due to wear; when this happens, the wrench or socket can’t grip and gain leverage on the bolt. 

Rusted metal parts can corrode. If those parts are the bolt’s threads, turning can be challenging. Both issues can be solved with some penetrating lubricant such as WD-40, a bolt extractor kit, drill and drill bits, and lots of elbow grease.

Sharpen Your Mower Blades Before Putting Them Back

There are two main reasons for removing the mower blades: to replace them with a new set of blades or to sharpen them. You should sharpen the blades every 20 to 25 hours; however, you should inspect the condition of the mower blades after each use to make sure they aren’t damaged.

If the blades are bent, dented, or dull beyond repair, replace them with a new set. Damaged or dull blades won’t get a clean cut. Instead, they will rip the grass. These ragged tears will weaken the plant and promote diseases. Thus, if you want to maintain your lawn in top condition, mow it with sharp blades.

3 Ways To Sharpen Them

When sharpening your mower’s blades, the most important thing to focus on is the honing angle and quality. You don’t have to make the blades razor-sharp. Butter knife sharp will suffice because, at this sharpness, they can slice through the grass blades easily when spinning at high speed. That said, here are the different sharpening methods you can use.

Filing With A Bench Vice

One of the easiest methods to sharpen mower blades is with a bench vice and hand file. Clamp the blade to the vice and start filing, applying pressure perpendicular to the blade. Grind down all imperfections and hone the edge shape, preferably at a 45-degree angle. When you’re done on one side, switch the blade on the other side and repeat.

Using A Bench Grinder

A bench grinder makes sharpening faster, but we don’t recommend this method unless you know how to use a bench grinder properly. Otherwise, you could end up damaging the blade. For this method, you should wear proper PPE. Turn on the bench grinder and hold the blade against it at an angle to sharpen it and hone the edges. If you’re comfortable around bench grinders, this method is perfect for sharpening heavily damaged or very dull blades.

Drill And Blade Sharpening Stone

If you’re not very familiar with bench grinders but don’t feel like sharpening the blades manually, this method is perfect for you. A blade sharpening drill bit works like a bench grinder, but many users find it easier to operate an electric drill. This method is also perfect for beginners – the sharpening bit works by hugging the edge of the mower blades, leaving little room for error.

FAQs

What’s the blade bolt size on the Bad Boy mower?

Most Bad Boy mowers use 5/8″-18 x 1-1/2″ GR 8 bolts for the blades; however, the actual bolt size could vary from mower to mower. The easiest way to tell what bolt size you need if one of your blade bolts is damaged or lost is by checking out the owner’s manual of the specific vehicle model that you have.

Are mower blade bolts reverse thread?

Mower blade bolts are not generally reverse threaded. However, if your mower has mower blade nuts, they could have reverse threads. Reverse threaded nuts ensure that the blade rotation doesn’t loosen the nut. That said, not all riding mowers use this system, and you’ll have to check your mower’s user manual to find out the specific type of bolt and nut that is used.

When should I sharpen my mower blades?

According to guidebooks, you should sharpen your mower blades every 20 to 25 hours of use, which is more or less twice per season. In reality, you may find that you have to sharpen them sooner. Depending on the type of grass and mowing frequency, you should sharpen them every ten hours, on average. 

You should also check the blades after each use, especially if you have rocky or bumpy terrain. If you suspect that the blades hit a rock or another solid obstacle, remove the blades and sharpen them to prevent grass ripping.

Summary

Quickly removing the mower blades to sharpen or replace them can make deck maintenance a breeze. 

An important thing to keep in mind when raising the mower to access the blades is to block the front wheels – especially if you’re using floor jacks or wheel ramps. And don’t forget to use WD-40 if the bolts are stuck.

Whether you’re a beginner or a seasoned riding mower user, we hope this guide can help you sort out the problem in no time.