Bad Battery?

Jefe

Member
Messages
13
Voltage drops from ~13 to 6 when I turn the key to start the Toro Recycler lawnmower. Sounds like it is just barely turning over. Pull-starts fine.

Is this a bad battery? It's a few years old.

(Sorry for cross-post mods.)
 

KennyV

Lawn Pro
Messages
5,447
Jefe...
have you checked all your battery cable connections, are you measuring this large voltage drop on the battery? If so try to give it a full charge, check the water level first, If this is a serviceable battery...
You can't expect much more than 2 to 3 years from the typical lawn mower battery, so there may be a new battery in your near future...
:smile:KennyV
 

Jefe

Member
Messages
13
Jefe...
have you checked all your battery cable connections, are you measuring this large voltage drop on the battery? If so try to give it a full charge, check the water level first, If this is a serviceable battery...
You can't expect much more than 2 to 3 years from the typical lawn mower battery, so there may be a new battery in your near future...
:smile:KennyV
Thanks Kenny. Yes, connections are all good as evidenced by the weak attempts of the engine to turn over. I measured it at charging plug and also at the battery terminals. It is not a serviceable battery.

Can you confirm whether that an excessive voltage drop?
 

twall

Lawn Addict
Messages
1,628
Going from 13 to 6, sounds like a bad plate or two, and you just aren't getting the amps......which would mean a bad battery. The initial charge of 13 sounds good, doesn't it, Kenny?
 

KennyV

Lawn Pro
Messages
5,447
Going from 13 to 6, sounds like a bad plate or two, and you just aren't getting the amps......which would mean a bad battery. The initial charge of 13 sounds good, doesn't it, Kenny?
Yes... like I was saying ... there may be a new battery in your near future... :smile:KennyV
 

blackie65

Forum Newbie
Messages
2
batteries seem to me to be something you just need to replace every couple years. I Haven't done it yet but have considered putting a battery tender on in the off season. This might get more than 2-3 yrs out of a battery
 

Jefe

Member
Messages
13
Way too much of a drop... 6 volts is not going to do it.. Were you able to put a charger on it?
:smile:KennyV
Yes. The battery was stored for the winter and I had re-installed it and charged it overnight prior to trying to start the mower with it.
 

jeff

Well-Known Member
Messages
151
When the battery drops volts as you discribe, the battery is usually the problem.
 

kalaukia37

Forum Newbie
Messages
8
:wink::biggrin::smile::confused2:
Yes. The battery was stored for the winter and I had re-installed it and charged it overnight prior to trying to start the mower with it.
Well ALOHA FROM HAWAII! MY NAME IS KALAUKIA37. I AM A NEW MEMBER AS OF TWO DAYS AGO. I LIVE ON OAHU IN HAWAII. I HAVE A J.D. 42 115 AUTOMATIC, 2006 YEAR. I HAVE FOUND OUT THAT IF YOU BUY AN INTERSTATE BATTERY WITH THE HIGHEST AMPS POSSIBLE, AND THAT YOU KEEP IT ON A VERY SMALL TRINCLE CHARGER THAT CANBE BOUGHT FROM NAPA FOR ABOUT $39.00, IT WILL PAY FOR ITS SELF FOREVER. IT WILL KEEP YOUR BATTERY FULLY CHARGED FOREVER. YOUR BATTERY B
UYING DAYS ARE OVER.

YOU MAY ALSO USE IT IN YOUR CARS, BOATS, SNOWMACHINES, ANYTHING. IT WILL PAY FOR ITS SELF IN ONE SEASON.

HERE IN HAWAII WE DONOT PUT OUR EQUIPTMENT IN STORAGE, WE USE THEM ALL YEAR LONG.
WELL MAY YOU USE THIS INFO. IN GOOD HEALTH AND GOD BLRSS YOU ALL!
 

BKBrown

Lawn Addict
Messages
1,415
:wink::biggrin::smile::confused2:Well ALOHA FROM HAWAII! MY NAME IS KALAUKIA37. I AM A NEW MEMBER AS OF TWO DAYS AGO. Welcome
IT WILL KEEP YOUR BATTERY FULLY CHARGED FOREVER. Longer, Yes Forever, NO !
Please turn off all caps ! :rolleyes:
 

poncho62

Active Member
Messages
71
There have been a number of posts on various forums about restoring batteries with a water/Epsom salt mix....I tried a couple last week and they seem to be holding up so far.....
 

Jefe

Member
Messages
13
So, I replaced the battery and charged the new one appropriately. The engine turns over WEAKLY, but doesn't really want to start - it will eventually, just barely. With a brand new charged battery, the voltage DROPS from 13.5 to 6 V while turning the key.

Would a bad starter cause a voltage drop?
 

poncho62

Active Member
Messages
71
Probably a bad starter....could also be a bad connection or bad ground.....Take it off and test it on the bench
 

twall

Lawn Addict
Messages
1,628
How do I test the starter?
He's talking about clamping it in a vise, hooking jumper cables from a good battery to it to see if it spins. Black (-) to the body, power (+) to the bolt that the wire attaches to.

But, I've found this is not always a good test. If your armature has bad spots, it'll spin just fine on the bench, but once you put a load to it, not much happens. Once it gets to the bad spot in the armature, it'll go dead - and remain that way until you move it (turn the motor by hand a bit).
 

KennyV

Lawn Pro
Messages
5,447
So, I replaced the battery and charged the new one appropriately. The engine turns over WEAKLY, but doesn't really want to start - it will eventually, just barely. With a brand new charged battery, the voltage DROPS from 13.5 to 6 V while turning the key.

Would a bad starter cause a voltage drop?
If your dropping over half of your available voltage ... My first place to look is a bad cable, either the positive OR the negative.. the starter solenoid could be about to fail or any of the connections that the battery cables attach.
You can check all of them by taking a 'good' set of heavy jumper cables and go directly from the battery to the starter...
Hook the negative to the engine or the mounting bolt for the starter...
then carefully contact the positive jumper cable to the large terminal on the starter...
This will spin the engine, (so be careful)...
If it turns over exactly as bad as it did using the factory wiring ... THEN you have a bad starter...
If it spins it as it should then you have one of the earlier mentioned problems...
I doubt it is the starter... if you were dropping all that voltage in the starter it would be smoking hot within 15 to 20 seconds... but if you check it with jumper cables Directly to the starter, you will know immediately what the problem is... :smile:KennyV
 

BKBrown

Lawn Addict
Messages
1,415
Good Job Kenny ! :thumbsup: Always good advice ! :biggrin:

I would add that it might not be the cables, but could be just the cable connections at either or both ends. I've found corroded connections in places where you might not expect them and that looked fine until taken apart.

I've been on here nearly as long as the Forum has been active and have nowhere near your # of posts !
 
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