If your mower won’t start, you’re not alone. This is one of the most common issues homeowners face, especially at the beginning of the season.

Most Common Causes

• Old or stale fuel

• Dirty or clogged carburetor

• Fouled spark plug

• Dead battery (riding mower)

• Safety switch not engaged

Quick Things You Can Safely Check

• Replace old fuel with fresh gas

• Check that the spark plug wire is connected

• Make sure the blade brake handle is fully engaged

• Confirm battery terminals are clean and tight

When It’s Time to Call

If fresh fuel and basic checks don’t solve the issue, the problem is usually fuel system or electrical related and requires proper diagnosis.

Typical Repair Range

Most no-start repairs fall between $90–$180, depending on parts and condition.

If your mower starts but shuts off after a few seconds, fuel flow is usually restricted.

Most Common Causes

• Dirty carburetor

• Clogged fuel line

• Blocked gas cap vent

• Dirty air filter

Quick Things You Can Safely Check

• Loosen the gas cap slightly and try again

• Inspect and clean the air filter

• Look for cracked or pinched fuel lines

When It’s Time to Call

If it continues to stall, the carburetor likely needs professional cleaning or rebuilding.

Typical Repair Range

Most stall-related repairs range between $100–$200, depending on severity.

If the pull cord feels extremely tight or won’t move, the engine may be binding.

Most Common Causes

• Oil or fuel in the cylinder

• Bent blade contacting the deck

• Damaged recoil starter

• Internal engine issue

Quick Things You Can Safely Check

• Ensure the mower wasn’t tipped incorrectly

• Inspect blade area (with spark plug disconnected)

• Check oil level

When It’s Time to Call

If the cord remains locked or extremely stiff, forcing it can cause further damage.

Typical Repair Range

Repairs typically fall between $95–$220, depending on the cause.

If you hear clicking but the engine won’t crank, the issue is usually electrical.

Most Common Causes

• Weak battery

• Bad starter solenoid

• Faulty starter motor

• Poor ground connection

Quick Things You Can Safely Check

• Charge the battery

• Clean terminals

• Confirm safety switches are engaged

When It’s Time to Call

If charging doesn’t resolve the issue, a proper electrical diagnosis is needed.

Typical Repair Range

Most no-crank repairs range between $95–$250.

If your battery keeps dying, the charging system may not be working properly.

Most Common Causes

• Weak or old battery

• Faulty voltage regulator

• Bad stator

• Corroded terminals

Quick Things You Can Safely Check

• Clean battery terminals

• Test battery charge

• Ensure connections are tight

When It’s Time to Call

Electrical system testing requires proper tools to avoid replacing unnecessary parts.

Typical Repair Range

Charging system repairs typically range between $120–$300, depending on components.

If the engine revs up and down or runs unevenly, it’s usually fuel-related.

Most Common Causes

• Partially clogged carburetor

• Dirty air filter

• Vacuum leak

• Old fuel

Quick Things You Can Safely Check

• Replace old fuel

• Clean or replace the air filter

• Make sure the choke isn’t partially engaged

When It’s Time to Call

Persistent surging usually requires carburetor service and proper adjustment.

Typical Repair Range

Most surging issues range between $100–$190.

If your mower shakes more than usual, something is likely out of balance.

Most Common Causes

• Bent blade

• Loose blade

• Damaged blade

• Loose engine mounting bolts

Quick Things You Can Safely Check

• Inspect the blade for visible bends

• Ensure the blade bolt is tight

• Check for missing hardware

When It’s Time to Call

Operating with vibration can cause additional damage to the engine and deck.

Typical Repair Range

Most vibration-related repairs fall between $75–$160.

Seeing smoke can be alarming, but it’s not always serious.

Most Common Causes

• Oil spilled after tipping the mower

• Overfilled oil

• Worn internal components

Quick Things You Can Safely Check

• Confirm the correct oil level

• Make sure the mower was not tipped on the carburetor side

When It’s Time to Call

If smoke continues after a few minutes of running, it should be inspected to prevent engine damage.

Typical Repair Range

Smoking-related repairs typically range between $90–$250, depending on severity.

If your mower leaves uneven patches or scalps areas of grass, blade or deck issues are likely.

Most Common Causes

• Dull blade

• Bent blade

• Deck out of level

• Worn deck components

Quick Things You Can Safely Check

• Inspect the blade for dull edges

• Confirm deck height settings

• Remove built-up grass under the deck

When It’s Time to Call

If uneven cutting continues, the blade or deck may need professional service.

Typical Repair Range

Most cutting issues fall between $70–$150.

If your mower runs but doesn’t pull itself forward, the drive system may need attention.

Most Common Causes

• Worn drive belt

• Stretched or broken cable

• Transmission wear

Quick Things You Can Safely Check

• Inspect cable tension

• Look for visible belt damage

When It’s Time to Call

Drive system repairs often require disassembly and proper adjustment.

Typical Repair Range

Self-propel repairs usually range between $100–$220.

If your mower makes a high-pitched squealing or squeaking noise when turning, it’s usually a sign that something in the drive system is slipping, worn, or under strain. Catching it early can prevent bigger (and more expensive) repairs later.

Most Common Causes

Worn or slipping drive belt

Loose or glazed belt pulley

Dry or worn idler pulley bearings

Hydrostatic transmission strain (zero-turn mowers)

Low or contaminated hydrostatic fluid (if serviceable)

Quick Things You Can Safely Check

Inspect the drive belt for cracking, glazing, or looseness

Look for debris wrapped around pulleys

Check for excessive belt slack

Listen closely — does the squeal happen only when turning, or constantly?

When It’s Time to Call

If the squealing continues or gets louder, the belt system may need replacement or adjustment. On zero-turn mowers, a persistent squeal during turning can indicate hydrostatic transmission wear, which requires proper diagnosis and should not be ignored.

Typical Repair Range

Drive belt replacement typically falls between $120–$220, depending on mower type.

Hydrostatic diagnosis and repair vary widely based on brand and severity.

If your mower makes a grinding or metal-on-metal sound while moving, stop using it right away. Grinding noises usually mean something is worn, loose, or failing — and continuing to run it can cause more damage.

Most Common Causes

Worn spindle bearings

Damaged pulley

Loose or misaligned belt

Transmission gear wear

Debris lodged in deck or drive components

Quick Things You Can Safely Check

Turn the mower off and disconnect the spark plug wire

Check under the deck for sticks, rocks, or debris

Inspect belts for fraying or misalignment

Spin blades by hand (carefully) to check for roughness

When It’s Time to Call

If the grinding continues after clearing debris, internal bearings, pulleys, or transmission components may be failing. These repairs require proper tools and should be addressed before further damage occurs.

Typical Repair Range

Most bearing or pulley repairs fall between $120–$250, depending on parts and mower type.

Transmission-related repairs vary by brand and severity.

Mower Pulls to One Side

If your mower drifts or pulls to one side while driving, it can make cutting uneven and frustrating. This issue is common with both riding mowers and zero-turns.

Most Common Causes

Uneven tire pressure

Worn steering components

Brake dragging on one side

Hydrostatic imbalance (zero-turn models)

Damaged or loose linkage

Quick Things You Can Safely Check

Check and equalize tire pressure

Inspect for visibly loose steering parts

Make sure the brake fully releases

Confirm nothing is bent or dragging underneath

When It’s Time to Call

If correcting tire pressure doesn’t fix the issue, steering components or drive systems may need adjustment or repair. Ignoring the problem can lead to uneven tire wear and added strain on parts.

Typical Repair Range

Minor adjustments often fall between $90–$150.

Steering or hydrostatic repairs vary depending on the mower.

If your mower starts but won’t drive, the issue is usually in the belt or transmission system.

Most Common Causes

Broken or slipped drive belt

Faulty idler pulley

Hydrostatic transmission failure

Broken linkage

Worn key in drive pulley

Quick Things You Can Safely Check

Inspect the drive belt underneath

Check for broken springs or loose linkage

Make sure the parking brake is fully released

When It’s Time to Call

If belts appear intact but the mower still won’t move, the issue may be internal to the transmission. Proper diagnosis is needed to avoid replacing the wrong parts.

Typical Repair Range

Drive belt replacement typically ranges from $120–$220.

Transmission repairs vary widely by mower type.

If your mower drifts or pulls to one side while driving, it can make cutting uneven and frustrating. This issue is common with both riding mowers and zero-turns.

Most Common Causes

Uneven tire pressure

Worn steering components

Brake dragging on one side

Hydrostatic imbalance (zero-turn models)

Damaged or loose linkage

Quick Things You Can Safely Check

Check and equalize tire pressure

Inspect for visibly loose steering parts

Make sure the brake fully releases

Confirm nothing is bent or dragging underneath

When It’s Time to Call

If correcting tire pressure doesn’t fix the issue, steering components or drive systems may need adjustment or repair. Ignoring the problem can lead to uneven tire wear and added strain on parts.

Typical Repair Range

Minor adjustments often fall between $90–$150.

Steering or hydrostatic repairs vary depending on the mower.

If you notice a burning rubber smell while mowing, shut the mower down immediately. This often means a belt is slipping or overheating.

Most Common Causes

Slipping or a worn belt

Seized pulley

Debris caught in the deck

Belt misalignment

Quick Things You Can Safely Check

Inspect belts for glazing or melting

Look for debris wrapped around spindles

Check for unusual belt slack

When It’s Time to Call

A slipping belt can fail suddenly and leave you stranded mid-job. If the smell continues, the drive system likely needs attention.

Typical Repair Range

Most belt replacements fall between $120–$220 depending on the model.