May 1, 2017

How to repair a riding lawn mower tire video

By Sears PartsDirect staff
You can often fix a small hole in a riding mower tire with sealant.
You can often fix a small hole in a riding mower tire with sealant.

If there is a small object embedded in the tread of a tire on your riding lawn mower, you can often repair it with tire sealant. This video shows which types of damage a sealant will fix, along with walking you through how to fix the flat tire.

For additional repair help, including common symptoms and troubleshooting tips, step-by-step riding lawn mower and tractor repair guides, and articles, check out our repair help section. In addition, find the riding mower parts you need to fix your mower.

Supplies or parts you might need

When there’s a hole or impaled object in the tread of a tire, you can often fix the tire with tire sealant. We'll show you how to use tire sealant to fix a flat so you can get back to mowing.

Find the leak

You know where the tire leak is if you see a nail, screw or other object stuck in the tire. Don't pull the object out before inserting the tire sealant. Otherwise, the sealant may not seal the hole.

If you don't know where the leak is, put air in the tire and spray soapy water on the tire. The leaking air makes bubbles in the soapy solution.

If you find the leak in the tread area, you can use the sealant to fix the leak.

You can’t use sealant to fix holes in the tire sidewall. Replace the tire if you find the leak in the sidewall.

Put in the sealant

Now, let's put in the sealant. Wear work gloves and eye protection when repairing your tire.

  1. Check the chart on the sealant bottle to determine how much sealant to use for the size of tire you're fixing. This tire needs 16 ounces of sealant.

  2. Rotate the wheel so the valve stem is in the 5 o-clock position.

  3.  Remove the cap and valve stem core from the tire.

  4. Open the sealant bottle and connect the hose that comes with the sealant to the bottle tip.

  5. Connect the other end of the hose to the tire's valve stem.

  6. Squeeze the bottle and inject the right amount of sealant into the tire.

  7. Disconnect the hose from the valve stem and wipe off any sealant residue.

  8. Reinstall the valve stem core.

  9. Fill the tire with air to the recommended pressure and reinstall the valve cap.

If an object is stuck in the tire, pull the object out now.

Drive the mower for 3 to 5 minutes to evenly distribute the sealant inside the tire.

If the sealant doesn't fix the leak, or the hole is in the tire's sidewall, replace the tire as shown in one of these videos.

On some tires, you can install an inner tube instead of replacing the tire.

That's it. Once you fix the tire, you can get back to mowing.

I hope this video helps you out today. Check our other videos on the Sears PartsDirect YouTube channel and subscribe to find out when we post new videos.

Symptoms common to all riding mowers & tractors

Choose a symptom to see related riding mower and lawn tractor repairs.

Main causes: dead battery, stale fuel, bad starter solenoid, ignition system problem, bad ignition interlock switch, clogged carburetor
Main causes: damaged cutting blade, worn deck pulley, damaged mandrel pulley, loose fasteners on mower deck components
Main causes: shift lever needs adjustment, neutral control needs adjustment
Main causes: engine overfilled with oil, leaky head gasket or sump gasket, damaged carburetor seals, cracked fuel pump, broken fuel line
Main causes: punctured tire or inner tube, leaky valve stem, damaged wheel rim
Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, dirty carburetor
Main causes: unlevel mower deck, dull or damaged cutting blades, worn mandrel pulleys, bent mower deck, engine needs tune up
Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged mandrel pulleys
Main causes: clogged carburetor, damaged flywheel key, dirty spark plug, stale fuel, improper valve lash, engine needs a tune up

Repair guides common to all riding mowers & tractors

These step-by-step repair guides will help you safely fix what’s broken on your riding mower or lawn tractor.

How to replace the air filter on a riding lawn mower

Get your mower running smoothly again by replacing the air filter—it's a quick job you can do yourself, following these steps.

Repair difficulty
Time required
 15 minutes or less
How to replace the starter motor on a riding lawn mower

If you hear the solenoid click but don’t hear the starter motor spin when you turn the key, follow these steps to replace it.

Repair difficulty
Time required
 30 minutes or less
January 1, 2015
By Lyle Weischwill
How to replace a riding lawn mower blade

If a blade on your mower is dull or bent, replace it following the steps in this repair guide.

Repair difficulty
Time required
 30 minutes or less

Articles and videos common to all riding mowers & tractors

Use the advice and tips in these articles and videos to get the most out of your riding mower or lawn tractor.

May 1, 2017

Riding lawn mower engine spins but won't start video

By Sears PartsDirect staff

Troubleshoot fuel, spark and compression issues.

May 1, 2017

How to repair a riding lawn mower tire video

By Sears PartsDirect staff

Learn when you can use sealant to fix a flat tire.

June 1, 2016

How to mow a lawn for healthier grass

By Erin Hynes

How often and tall you mow your lawn has a big impact on its health. Check out these 3 rules.