How to Troubleshoot a Walk-Behind Ferris Lawn Mower That Won't Start

The Ferris Walk-Behind Lawnmower is a commercial-grade lawnmower that is propelled by a small engine. The engine powers the cutting blade and the drive wheels. The operator walks behind the mower and steers using a lever on each side of the handlebars. Ferris Walk-Behind Lawnmowers are built to last for many years, but sometimes you may have trouble starting the engine. The manufacturer suggests the following troubleshooting steps to find and correct the problem.

Spark plug
Gas

Instructions

- 1
  Disengage the PTO (power take-off). Push down on the PTO switch to turn it off. The mower will not start if the PTO is engaged.
- 2
  Check the fuel level in the fuel tank. If the level is near empty, add fuel until the lever is near the full-line indicator.
- 3
  Determine is the gas is old or has water in it. If the gas has been sitting for over a month, you may need to drain the gas tank and add fresh gas.
- 4
  Open the choke. If the engine is flooded, you may need to move the throttle control out of the choke position. Push the choke knob down to open the choke.
- 5
  Replace the spark plug. Remove the spark plug wire, using your fingers. Remove the spark plug, using a socket wrench. Install the new spark plug and tighten securely, using a socket wrench. Push the spark plug wire onto the spark plug, using your fingers.

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