Lawn mowers run more efficiently with a new spark plug or one that’s fresh. If yours is bogged down by debris or worn out, it won’t be able to generate the spark needed to start your engine. A bad spark plug can also reduce the performance and fuel economy of your lawn mower. To keep your machine in working condition, check your spark plugs for wear and tear regularly and change them when necessary.
Before performing any maintenance on your lawn mower, refer to your owner’s manual for maintenance instructions and safety information. Maintenance instructions vary by model, so depending on your lawn mower model our instructions may vary slightly.
Before changing the spark plug on your mower, please abide by these safety precautions:
- Shut off the engine
- Allow the engine to become cool to the touch
- Disconnect the spark plug wire to prevent accidental starting
To carry out this task, you’ll need these tools:
- 5/8 spark plug socket
- Extension
- Ratchet
Begin by connecting the spark plug socket to the extension, and connect the extension to the ratchet to create one tool. Place this on the mower’s spark plug and turn it counter-clockwise to remove the spark plug from the head of the engine.
Check the gap on your new spark plug. Use a specialized gap tool or a set of feeler gauges to adjust the gap between the electrodes to the appropriate distance (refer to your owner’s manual for appropriate gap).
Install the new spark plug by hand. If you use the ratchet, you run the risk of cross threading, which will cause you to replace the entire head of the engine. Get the new plug finger tight. Use the spark plug socket, extension, and ratchet to tighten the spark plug a bit more.
Once the spark plug is snug, give it another half turn to make sure it has proper torque but do not over-tighten. Reconnect the ignition wire and you’re done.
Your lawn mower is like a car. It needs annual maintenance from oil changes and new air filters to fresh spark plugs. Since spark plugs corrode over time, make sure you stay on top of regular maintenance to keep your mower working effectively.
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Why Weingartz?
Weingartz, family owned and operated, began in 1945 as a farm supply store for local Michigan families. In the 1970s, we began to focus exclusively on outdoor power equipment. Over time, we morphed into the “power equipment superstore” that now defines all of our locations. The staff and experts at Weingartz work diligently to provide the best service possible and give honest and helpful advice to each and every customer.
Weingartz also sells parts for all outdoor power equipment at https://weingartz.com/parts-lookup.
Weingartz
5436 Jackson Rd.
Ann Arbor, MI 48103
(734) 239-8200
info@weingartz.com
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