April 19, 2023

Riding Mowers & Tractors: How do I charge a dead battery on my riding mower?

During the off-season, the battery can lose its charge. Charge the battery fully before storing your tractor for the winter. You may also need to charge the battery again before starting the tractor in the spring.

Replace the battery if it won't charge. If you charge the battery with an external charger but the battery drains when you're running the tractor, then the engine's alternator could be the problem. The alternator recharges the battery and powers the tractor while the engine runs. To check whether the alternator's charging the battery, use a multimeter to measure the DC voltage at the battery with the engine running. You should measure between 13 and 14 volts. If not, then you may need to replace the alternator.

When your mower's battery is dead and you need to mow right away, use the tips in our video to safely jump-start the mower.

riding mowers & tractors

THESE REPAIRS MAY HELP SOLVE YOUR RIDING MOWERS & TRACTORS PROBLEM

JC-RM-Replace-the-riding-mower-battery

Replace the riding mower battery

If the riding mower or lawn tractor engine doesn't make any noise when you try to start the mower, it might be time to replace the lawn tractor battery. A good indicator that the lawn tractor needs a new battery is if you charge the battery, and it loses the charge quickly.

Riding mower battery

Find the required part specific to your product.

JC-RM-Replace-the-alternator

Replace the riding mower alternator

The alternator attaches to the engine under the flywheel and generates power for the tractor while the engine is running. The alternator also recharges the battery while the engine runs. If the engine won't start because the battery drains while running the tractor, the alternator could be at fault. Check DC voltage at the battery with the engine running. You should measure between 13 and 14 volts. If not, then you may need to replace the alternator.

Riding mower alternator

Find the required part specific to your product.

Most common symptoms to help you fix your riding mowers & tractors

Choose a symptom to see related riding mower and lawn tractor repairs.

Main causes: worn or broken blade belt, broken belt idler pulley, blade clutch cable failure, bad PTO switch, damaged ma…

Main causes: faulty battery, bad alternator…

Main causes: punctured tire or inner tube, leaky valve stem, damaged wheel rim…

Main causes: dead battery, stale fuel, bad starter solenoid, ignition system problem, bad ignition interlock switch, clo…

Main causes: damaged tie rods, bent or worn wheel spindle, worn front axle, damaged sector gear assembly…

Main causes: shift lever needs adjustment, neutral control needs adjustment…

Main causes: clogged carburetor, damaged flywheel key, dirty spark plug, stale fuel, improper valve lash, engine needs a…

Main causes: worn or broken ground drive belt, bad seat switch, transaxle freewheel control engaged, transaxle failure, …

Main causes: unlevel mower deck, dull or damaged cutting blades, worn mandrel pulleys, bent mower deck, engine needs tun…

Most common repair guides to help fix your riding mowers & tractors

These step-by-step repair guides will help you safely fix what’s broken on your riding mower or lawn tractor.

How to replace a mandrel assembly on a riding lawn mower

How to replace a mandrel assembly on a riding lawn mower

Replace the mandrel assembly if the blade shaft vibrates or doesn't spin.…

Repair difficulty
Time required
 30 minutes or less
How to replace the flywheel key on a riding lawn mower

How to replace the flywheel key on a riding lawn mower

If the engine won't restart after hitting a stump or rock, the problem could be a sheared flywheel key. Follow these ste…

Repair difficulty
Time required
 60 minutes or less
How to replace a riding lawn mower ignition coil

How to replace a riding lawn mower ignition coil

If you're not getting spark from a good spark plug, the problem could be the ignition coil. Follow these step-by-step in…

Repair difficulty
Time required
 30 minutes or less

Effective articles & videos to help repair your riding mowers & tractors

Use the advice and tips in these articles and videos to get the most out of your riding mower or lawn tractor.

How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

Riding lawn mower engine clicks but doesn't turn over video

Riding lawn mower engine clicks but doesn't turn over video

Check the starter solenoid, starter motor, wiring, battery and engine.…