Lawn Mower Has No Spark: Safe Ignition-System Checks Before Replacing Parts
A practical diagnostic order for confirming a no-spark condition, checking the plug and ignition controls, and knowing when to stop.
-
-
Lawn Mower Fuel Coming Out of the Air Filter: Carburetor Overflow Causes
Gas at a mower air filter usually points to excess fuel backing out through the carburetor. Learn the likely causes, safe checks, and when service is the better option.
-
Lawn Mower Carburetor Leaks Fuel While Parked: Float, Needle, and Fuel-Shutoff Checks
A mower that drips gas while sitting can have a stuck float, leaking needle valve, failed fuel shutoff, or an external fuel-system leak. Start with safe isolation and a careful diagnostic order.
-
Lawn Mower Gas in Oil: Carburetor, Fuel Shutoff, and Safe Repair Checks
Gas in a mower’s oil usually points to uncontrolled fuel flow. Learn safe checks for the carburetor, fuel shutoff valve, fuel pump, and oil change.
-
Lawn Mower Stops When Hot but Restarts After Cooling: Heat-Related Fuel and Ignition Checks
A mower that quits after warming up can point to restricted fuel flow, an ignition fault, overheating, or excessive cutting load. Use this safe diagnostic order before replacing parts.
-
Lawn Mower Loses Power in Tall Grass: Blade, Deck, Airflow, and Engine-Load Checks
A practical diagnostic order for a mower that bogs down in tall grass, from cutting height and deck clogs to blade condition and engine airflow.
-
Lawn Mower Backfires When Starting or Shutting Down: Timing, Fuel, and Heat Checks
A practical diagnostic order for a lawn mower that pops on startup or after shutdown, with fuel, heat, ignition-timing, and flywheel-key checks.
-
Lawn Mower Blows Black Smoke: Air Filter, Choke, and Fuel-System Checks
Black exhaust usually points to an overly rich fuel-air mixture. Work through the air filter, choke, fuel condition, oil level, and carburetor checks in a safe order.
-
Lawn Mower Spark Plug Keeps Fouling: Oil, Fuel Mixture, and Ignition Checks
A repeatedly fouled mower spark plug is usually a symptom, not the root problem. Use plug deposits, oil level, fuel condition, airflow, and ignition behavior to narrow it down safely.
-
Lawn Mower Spark Plug Is Wet With Gas: Flooding Causes and Safe Drying Checks
A wet, fuel-smelling mower spark plug often points to a flooded engine, but it can also signal an ignition or fuel-system problem. Use this safe diagnostic order before trying to start it again.
