Walkbehind 7H19 Battery?

9973720wb19 · Apr 7, 2014

I own a commercial 54" 7H19 JD walkbehind mower - the 2008 model. It has electric start option, but the battery constantly needs to be charged. After going through a battery each season, I started using a charger; that solved the problem, but it always is drained down. The engine does not seem to charge the battery at all. anyone else had any similar problems?

RandyT · Apr 7, 2014

Most likely either the voltage regulator isn't working or the alternator/stator under the flywheel is toast. Could be both, have seen it on other mowers. You didn't say what engine you have so I am just guessing.

9973720wb19 · Apr 8, 2014

RANDYT said:
Most likely either the voltage regulator isn't working or the alternator/stator under the flywheel is toast. Could be both, have seen it on other mowers. You didn't say what engine you have so I am just guessing.

The engine is a Kaw 19HP V-twin. So you think it should be charging?

RandyT · Apr 8, 2014

When the engine is running take a volt meter across the battery terminals and see what the voltage is. Should be 13.5-14V. If lower than 13 then check to make sure you have battery voltage at the wire that attaches to the voltage regulator. If battery voltage there, disconnect the wires coming from the alternator under the flywheel and see what the voltage is when going wire to wire, be advised this voltage with be AC not DC. Just guessing AC voltage should be 28-32 volts, but could be higher. If that checks out and have battery voltage at regulator then I would say bad regulator. If voltage from stator under flywheel is excessively low, then most like bad stator.

If you have proper voltage at battery when running, but still discharges battery, I would start looking for something that is draining the battery.