How to Install a Lawnmower Battery


The addition of a riding lawnmower to a home makes the task of mowing the lawn easier and even enjoyable for some. A riding lawnmower requires regular maintenance. Included in this maintenance is the battery and there will come a time when the battery will need replacement. This is not the type of issue that requires a service company. It is something that can be performed by the homeowner in a short time period.

Step 1

Locate the battery. Most mowers locate the battery under the seat or the hood of the mower. If the battery is not in either of these locations, refer to the owner's manual for the proper location of the battery.

Step 2

Dissolve 5 tsp. of baking soda in 1/2 cup of warm water. This solution will remove any acidic corrosion on the battery terminals.

Step 3

Pour the baking soda and water solution over the battery terminals and allow it to sit for five minutes. When the solution stops bubbling that means the acidic corrosion is dissolved. Wipe away any remaining baking soda solution.

Step 4

Remove the cables from the old battery. Most batteries for riding mowers have a standard through-bolt that holds the battery cable on the terminal. Some may have a regular vehicle-type battery terminal. Either one can be removed with adjustable wrenches.

Step 5

Remove the battery hold-down. Most mowers use a bungee cord type hold-down for the battery. Some mowers will require additional tools to remove a metal hold-down.

Step 6

Remove the old battery and properly dispose of it.

Step 7

Place the new battery in the tray. Make sure the terminals are properly oriented so the cables will reach the correct terminals.

Step 8

Install the battery hold-down.

Step 9

Connect the red battery cable to the positive terminal on the battery. Make sure not to touch both battery terminals at the same time.

Step 10

Connect the black battery cable to the negative terminal of the battery.

Step 11

Spray the battery terminals with the protector. This will help to limit the amount of corrosion in the future.

Step 12

Start the mower.

Tips and Warnings

  • Make sure to properly dispose of the old battery. Never touch both terminals of the battery at the same time, because this can cause electrical shock.

Things You'll Need

  • Baking soda
  • Water
  • Rag
  • 2 adjustable wrenches
  • Battery terminal coating


  • Clarence White, Toro Certified Mechanic; Berlin, MD
Keywords: riding mower, mower battery, batery installation