Why does my lawn mower battery keep going dead?

Your lawn mower battery can keep draining when you battery cables are loose or your connections have become dirty or corroded. A faulty charging system, bad battery and leaving the ignition key in the on position can also cause your battery to drain.

What keeps killing my lawn mower battery?

One issue is loose cables where they connect to the battery posts. A loose connection makes a battery work harder, thereby draining it of power more quickly. Cleaning the posts and tightening the connections should renew the battery’s ability to hold a charge. A larger problem is a cracked battery case.

Why won’t my riding lawn mower battery hold a charge?

Is Your Lawn Mower or Small Engine Battery Dead? If your lawn mower battery won’t hold a charge, connect it to the charger. If it isn’t fully charged within 8 hours, your battery is dead and you’ll need to replace it. … If it holds the charge through testing, you may have an issue with the alternator.

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How long should a battery last in a riding lawn mower?

As a general rule, you can expect the battery in a riding lawn mower to last you for about four years. Once it gets near the end of this lifespan, you’ll notice the battery will not be holding its charge for as long as it once did.

How do you test a lawn mower for battery drain?

One way to test the lawn mower for this condition is to check for a current draw while the engine is turned off. Disconnect the positive battery cable from the battery. Connect an ammeter between the positive battery terminal and the battery cable.

Do lawn mowers have alternators?

Reel lawn mowers don’t have an engine at all, so they do not have an alternator. Powered push lawn mowers have a motor, but it does not contain an alternator. Riding mowers do have alternators in their engines.

Will a lawn mower run with a dead battery?

Many of the features on a lawnmower are impossible to use without the assistance of a battery. The good news is that most riding lawnmowers come with a charging system so that you can always make sure the battery is fully charged prior to using your lawnmower again.

How does a riding lawn mower charge its battery?

Most lawn tractors possess one of two types of charging systems to help keep the battery up and running. One type of charging system is the belt-driven alternator, typically mounted on the engine. As the belt turns the alternator, the alternator continually generates power to recharge the battery.

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How do I know if my lawn mower battery is bad?

Read the meter. If it has 12.7 DC volts or higher, the battery is good and something else is causing your starting problem. If the voltage reading is lower, the battery is discharged to some degree but may perk up after charging. If it reads 11.5 volts or lower, the battery is most likely sulfated and needs replacing.

Can you jump a lawn mower battery with a car?

You can jump the mower with the battery in your car or with a portable jump-starter, but you can only use your car battery if your mower has a 12-volt battery. … If your mower has a 6-volt battery, and you don’t have a 6-volt jump-starter, your options are to trickle-charge the battery or to buy a new one.

Why is my riding mower losing power?

Incorrect amounts of air or fuel will cause the engine to run sporadically or not at all, as will a weak or improperly timed spark. An engine not getting the right amount of fuel, air or a proper spark will exhibit a loss of power.

What do you do with a lawn mower battery in the winter?

It’s a good idea to remove your lawn mower battery for the winter and store it in a cool, dry place. Be sure to store it away from gas cans, the water heater or furnace. Disconnect the battery cable from the battery, starting with the negative cable (it will have a minus sign).

Can a bad battery cause a lawn mower to stall?

Check that all the safety switches are working correctly, it is possible the seat switch is bad or loose plug/ bad wire. Also if battery weak or charging system weak/faulty the clutch will stall out engine, charge battery up with charger and try.

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What causes tractor battery to drain?

Overtime, wires, connectors and components in these circuits wear out and may cause a myriad of malfunctions, including accidental connections. Even with your ignition key off, a loose electrical wire may reroute your battery’s charge and drain it overnight.

How do you test a Briggs alternator?

For the easiest alternator test, simply turn on the headlights to your lawn mower or outdoor power equipment. Then, turn off the engine. If the lights dim, the alternator works. If not, it doesn’t.