How do you repair a lawn mower engine?


Quick Answer

Lawn mower problems are commonly associated with loose, disconnected or dirty spark plugs, and to solve the problem, you must remove the spark plug and replace it with a new one. This can be done in minutes at a low cost.

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Full Answer

  1. Gather the right equipment

    You need a spark plug wrench and a spark plug gap gauge, which you can purchase from most hardware or home improvement stores. You also need new spark plugs, which are available at auto parts stores.

  2. Find and remove the current spark plug

    Most spark plugs are located on the front or at the side of the mower. Once you locate it, disconnect the spark plug lead. If the wire doesn't come straight off, wiggle it a little, or use pliers to loosen it if it's stuck. Remove the spark plug by turning it to the left with a wrench.

  3. Check the spark plug gap

    Use the spark plug gauge to make sure the spark plug gap of your new spark plug is set to the correct distance as stated in the manual. If it isn't, gently tap the end of the spark plug on a hard surface to bend the gap out slightly or to increase it.

  4. Replace the spark plug

    Put in the new spark plug by fitting it in the hole and turning to the right. Once in, tighten the spark plug with a wrench.

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