Common Mower Problems and Simple Checks First

Common mower problems and simple checks first can save time and prevent a small fault from becoming a repair. Start with fuel, air, blades, and wheels before you assume a major fault.

Work safely, keep hands clear of blades, and stop the engine before you inspect underneath. Note what changed, since that often points to the cause.

Start with a safe check

Park on level ground, stop the engine, and let hot parts cool. Remove the key or spark plug wire where the manual directs.

Look for loose parts, leaks, flat tires, and built up grass under the deck.

Write down the symptom, such as no start, poor cut, vibration, or loss of drive.

Mower will not start

Check fuel level, fuel age, and fuel valve position. Old fuel is a common cause.

Check the choke, throttle, blade control, and seat switch position.

Check the air filter for dirt, and check the spark plug for fouling or a loose lead.

Poor cut or uneven finish

Check tire pressure, deck level, and blade sharpness. A dull blade tears grass.

Check for a bent blade, a loose blade bolt, or grass packed under the deck.

Mow at a steady pace, and avoid cutting too much grass at once.

Vibration or strange noise

Stop at once if vibration is strong. Check blades, blade bolts, and deck parts for damage.

Check wheels and axles for play, and check for debris wrapped around spindles.

Do not keep mowing through heavy vibration, since it can damage bearings.

Loss of drive or weak power

Check the drive belt for wear, slack, or debris. Check drive controls for full travel.

Check air flow around the engine, and clear grass from cooling fins.

If power stays weak after simple checks, get service advice before you adjust engine settings.

A simple first check list

• Fuel, air filter, spark plug, and controls
• Blade condition, deck level, and tire pressure
• Belts, wheels, and debris under the deck
• Leaks, loose bolts, and unusual noise

Work through the list in order, and test after each change.

Keep a short log, so repeat faults are easy to spot.

Check battery charge and cable ends on electric start models.

Check the fuel cap vent, since a blocked vent can starve the engine.

Check the oil level, and top up only with the grade in the manual.

Clean the deck after each mow, so grass does not hide damage.

Store the mower dry, with the deck clean and tires at the right pressure.

After a repair, mow a small test area before a full job.

Check the discharge chute for clogs, and clear it with the engine off.

Check the seat switch and brake switch for dirt or loose wires.

Check the blade spindle for smooth spin and no grinding.

Check the drive wheels for worn tread or loose hubs.

Keep spare blades, belts, and filters suited to your model.

Check the deck belt tension, and look for cracks or fraying.

Check the steering and height adjuster for smooth movement.

Check the grass bag or chute for tears that leak clippings.

Check the engine air intake for grass and dust after dry mowing.

Check the mower for fuel smell or leaks before each start.

Check the throttle cable for slack or sticking.

Check the wheels for grass packed around the hubs.

Check the deck wash port for clogs after wet mowing.

Conclusion

Check fuel, air, blades, deck, tires, and belts first, and stop for service advice when a fault persists. For mower help, browse the Lawn Mowers range and the Shop. For help, use the Contact us page and the Support page.