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What is draining my mower's battery?

Posted on 8/20/19 at 11:14 am
Posted by High C
viewing the fall....
Member since Nov 2012
53815 posts
Posted on 8/20/19 at 11:14 am
quote:

Back during the spring, I was having electrical issues with my mower starting. I replaced the battery, but it didn't solve the problem. I ended up getting it repaired at the shop, where they "solved" the problem by replacing the solenoid. I got it home, cranked it, mowed my yard. Next time I get ready to mow, my battery is completely dead. I jumped it off and mowed until the battery was so dead that it wouldn't even engage the blades with the PTO. I went to Autozone (90 day warranty) and got a new battery. I've now been through four batteries this summer, and it's basically been a repeat of the above scenario each time. Any idea what continues to drain to completely dead my brand new batteries?

No, I'm not leaving the key on.
Posted by SquintEyedSoutherner
Member since Jul 2019
80 posts
Posted on 8/20/19 at 11:16 am to
Have you tried disconnecting the battery when not in use?
Posted by DCtiger1
Panama City Beach
Member since Jul 2009
8778 posts
Posted on 8/20/19 at 11:16 am to
Probably needs more gas.
Posted by LSU6262
Member since Jun 2008
7492 posts
Posted on 8/20/19 at 11:18 am to
quote:

No, I'm not leaving the key on


The mower doesn't seem to know that
Posted by LCA131
Home of the Fake Sig lines
Member since Feb 2008
72598 posts
Posted on 8/20/19 at 11:18 am to
That spineless, shitty neighbor of yours is stealing the juice at night. Set a trap and catch him!
Posted by ehidal1
Chief Boot Knocka
Member since Dec 2007
37136 posts
Posted on 8/20/19 at 11:19 am to
Posted by 007mag
Death Valley, Sec. 408
Member since Dec 2011
3873 posts
Posted on 8/20/19 at 11:19 am to
Sounds like the gizmo isn't charging your battery when the mower is running.
Posted by PipelineBaw
TX
Member since Jan 2019
1422 posts
Posted on 8/20/19 at 11:19 am to
Get a gas mower
Posted by Bedhog
Denham Springs
Member since Apr 2019
3741 posts
Posted on 8/20/19 at 11:21 am to
you hava a bad pto or pto switch
Posted by MF Doom
I'm only Joshin'
Member since Oct 2008
11712 posts
Posted on 8/20/19 at 11:22 am to
Electric powered mowers are for women and little men
Posted by High C
viewing the fall....
Member since Nov 2012
53815 posts
Posted on 8/20/19 at 11:22 am to
quote:

you hava a bad pto or pto switch


So the PTO is draining the battery while running?
Posted by carrguitar
Member since Oct 2014
738 posts
Posted on 8/20/19 at 11:23 am to
Robertson coach has been stealing it overnight to get his lawn care business off the ground.
Posted by Bedhog
Denham Springs
Member since Apr 2019
3741 posts
Posted on 8/20/19 at 11:24 am to
quote:

So the PTO is draining the battery while running?


yes. high amperage draw. what make / model mower?
Posted by arcalades
USA
Member since Feb 2014
19276 posts
Posted on 8/20/19 at 11:42 am to
test the alternator
check wiring very carefully
look at youtube for eliminating common parasitic draws

usually corroded connector somewhere or bad regulator which caused an open
Posted by skinny domino
sebr
Member since Feb 2007
14341 posts
Posted on 8/20/19 at 11:44 am to
Chicken got a cool board for this//home/garden board...dem baws know some stuff
Posted by Bedhog
Denham Springs
Member since Apr 2019
3741 posts
Posted on 8/20/19 at 11:45 am to
quote:

test the alternator
Posted by tenfoe
Member since Jun 2011
6847 posts
Posted on 8/20/19 at 11:47 am to
Bad magneto (like alternator on a small engine) not keeping battery charged. Probably getting enough juice to run mower but you need 7-9 volts to keep PTO open. You can crank and run with about 7 but not strong enough to run PTO
Posted by KosmoCramer
Member since Dec 2007
76526 posts
Posted on 8/20/19 at 11:49 am to
Half the people in this thread think the mower is fully electric.

Half think its gas with electric start
Posted by LSU6262
Member since Jun 2008
7492 posts
Posted on 8/20/19 at 12:03 pm to
Get one of these

Posted by Bigfishchoupique
Member since Jul 2017
8402 posts
Posted on 8/20/19 at 12:09 pm to
quote:

Bad magneto....
No. The magneto provides hi voltage for ignition. The magneto does not charge the battery. The stator ring provides amperage to change battery. Kind of like an alternator.
This post was edited on 8/20/19 at 12:10 pm
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