Simplicity Front-engine lawn tractor Parts — Browse All Models

Replacing the spark plug in your Simplicity front-engine lawn tractor

• Park the tractor on a level surface in a well-ventilated area and set the parking brake.
• Turn the ignition switch off and remove the key. Let the engine cool.
• Wear work gloves to protect your hands.
• Lift the tractor hood and disconnect the spark plug wire.
• Use a spark plug wrench to remove the spark plug from the engine.
• Using a gap tool, set the gap on the spark plug to the gap specified in the owner’s manual. For this engine, the gap is .03 inches. Thread the new spark plug into the engine and tighten it with the spark plug wrench. Tighten the spark plug firmly, but don't overtighten, so you can remove the spark plug easily the next time you replace it.
• Reconnect the spark plug wire and lower the tractor hood.

How to fix your Simplicity front-engine lawn tractor when it won't move

Replace the ground drive belt if you find it worn or broken when the riding lawn mower won't move. If the engine dies when you release the brake, then the seat switch may be unplugged or broken. Our troubleshooting video riding lawn mower engine dies when you release the brake shows how to check the seat switch. Replace the seat if it's damaged and won't activate the seat switch.

Check the transaxle freewheel control to see if the drive is disengaged. Shift the freewheel control to engage the transaxle if you find the control in the freewheel position. Purge air from the transaxle before using the riding mower the first time and after any transaxle repair. Tune up the mower engine if it sputters and then stalls when engaging the drive system. Rebuild or replace the carburetor if it's clogged and not providing the engine with fuel to stay running when driving the riding mower.