Why won't my Toro Z Master Professional 5000 Lawn Mower engine start?
- Rrobert12Aug 28, 2025
If your Toro Lawn Mower engine won't start, struggles to start, or stalls, several factors could be at play. First, ensure the fuel tank isn't empty and the fuel-shutoff valve is open. Check the oil level in the crankcase and add oil if it's low. Position the throttle control midway between the SLOW and FAST settings. Replace a dirty fuel filter and clean or replace a dirty air-cleaner element. Inspect the spark plug for fouling or improper gapping, adjusting or replacing it as needed. Also, verify the spark-plug wire connection. If the seat switch isn't working right, check the seat-switch indicator and replace the seat if needed. Finally, examine the electrical connections for corrosion, looseness, or damage, cleaning and reconnecting them as necessary.