Common problems and repair guides for push mowers
Push mowers — both self-propelled and push — are powered by Briggs & Stratton, Honda, Kohler, and Toro engines. Most push mower problems come down to stale fuel, a clogged carburetor, a fouled spark plug, or a worn blade adapter. Because these engines are simple and accessible, most repairs can be done in a garage with basic hand tools. Our push mower guides give you the exact steps and part numbers for your engine model.
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John Deere Mower Deck Has a Hole in It
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A hole in a mower deck is a structural compromise that typically results from high-impact debris, severe corrosion, or blade-to-housing contact. Small holes can be patched with steel plate kits or high-strength epoxy, but structural failures near spindle mounting points require professional welding or complete housing replacement. If the integrity of the discharge chute or spindle mount is compromised, the deck is unsafe to operate and requires immediate repair to prevent projectile hazards.
The most likely causes for your Kawasaki mower engine not staying running include fuel issues, a clogged carburetor, or ignition problems. Start by checking the fuel supply and inspecting the carburetor for blockages.
If your Craftsman push mower turns over but fails to fire, the issue is almost always a breakdown in the fuel-air delivery or the ignition system. Most often, stale gasoline has gummed up the carburetor jets or the spark plug has fouled due to carbon buildup. By systematically testing for spark and checking fuel flow from the tank to the combustion chamber, you can identify the culprit in under an hour.
When a push mower starts and then dies, it is usually struggling to get enough fuel or air to keep running. Most often, this is caused by stale gasoline clogging the carburetor or a dirty air filter blocking airflow.
Most Honda GCV160 starting issues are caused by old fuel clogging the carburetor or a fouled spark plug. Start by checking for fresh gasoline and inspecting the spark plug for carbon buildup or debris.
Changing the oil in your Kawasaki 730 mower engine is essential for maintaining its performance and longevity. Begin by gathering your tools and supplies, and follow the specific steps outlined herein to ensure a proper oil change.
A lawn mower leaking oil is often caused by an overfilled crankcase, a loose oil drain plug, or a degraded gasket or seal. Start by cleaning the engine area to pinpoint exactly where the oil is originating, then check your oil level and tighten any loose external fasteners.
A surging engine is almost always caused by a restricted fuel flow or an air leak, which forces the engine to hunt for a steady RPM. Start by replacing old fuel, cleaning the carburetor, and checking for air leaks around the intake gasket.
A stuck pull cord usually indicates that the engine has seized, debris is caught in the blade, or the recoil starter mechanism is jammed. Start by removing the spark plug wire to ensure the mower cannot accidentally start while you inspect the blades and starter assembly.
Black smoke from a lawn mower indicates that the engine is burning too much fuel, a condition known as running rich. This is most commonly caused by a clogged air filter restricting oxygen or a faulty carburetor that is flooding the engine with too much gas.
An uneven cut is almost always caused by an unlevel mower deck, uneven tire pressure, or dull mower blades. Start by checking your tire pressure and ensuring your mower deck is perfectly level with the ground on a flat surface.
Most Troy-Bilt mowers fail to start after winter due to stale fuel clogging the carburetor or a fouled spark plug. Begin by replacing the old gasoline with fresh fuel and checking the spark plug for corrosion or carbon buildup.
Most push mowers fail to start due to old fuel clogging the carburetor or a fouled spark plug. Start by checking your fuel level and freshness, then inspect the spark plug connection to ensure it is clean and properly seated.
First, perform the 'starting fluid test' by spraying a 1-second burst of carb cleaner into the air intake; if the engine fires momentarily, you have a fuel delivery issue, likely a clogged main jet or gummed needle. If it doesn't fire, verify spark using a tester or by grounding the plug against the cylinder head while pulling the recoil. Most Craftsman mowers utilize Briggs & Stratton engines where a sheared flywheel key (caused by hitting an object) or a fouled RC12YC spark plug are the most frequent culprits.
Most-needed maintenance items to keep your equipment running.
A fresh spark plug ensures easy starting all season. Replace yearly.
Find on AmazonA clean air filter prevents rich running and hard starts.
Find on AmazonFresh 30W oil keeps the engine running cool and clean.
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