Engine Fails to Start

• This is perhaps the most frustrating problem Wheel Horse owners can encounter. When the engine simply will not start it can be difficult to isolate the problem, but there are some simple steps owners can take to determine the most likely cause. If the engine will not start, the first thing to check is the quality of the fuel in the tractor. Fuel begins to deteriorate over time, so if it has been awhile since you topped off the tank it is worthwhile to drain the fuel tank and refill it with fresh gas.
  
  

Check for Loose Wires

• If your Wheel Horse tractor refuses to start, it is important to check for any loose, frayed or damaged wire. If any damage is found, those wires should be replaced. Also check for any components that may have sustained damage and have them repaired or replaced. If the wiring and components look good, move on to the clutch switch. Make sure the tractor clutch level is disengaged, then make sure the switch is closed. Move the lever to the engaged position and make sure the switch is open. If the switch is not open when the clutch is engaged, adjust the switch until the switch is in the proper position.
  
  

The Interlock

• Wheel Horse tractors come with an interlock mechanism designed to enhance the safety of the user, but sometimes that interlocking system malfunctions and prevents the tractor from starting. It is possible to bypass this interlock for testing purposes by removing the red wire from the engine block. With the wire disconnected, the engine should start. When the wire is replaced, the engine should not start. If the tractor fine with the red wire removed but will not start with it in place, the interlock module will need to be replaced. While it is possible to run the tractor with the wire removed, this is not recommended as a long-term solution. It is important to not use this workaround long-term and to get the module replaced as soon as possible.