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CMM1200 burnt up motor

#1

C

cmm1200

I switched from 17amp to new 22amp batteries in my B&D cmm1200. This resulted in the motor being destroyed on my first use. What could have caused this? I did install and wire the batteries correctly. That was confirmed.


#2

reynoldston

reynoldston

It sounds to me like the starter motor was bad before you changed the batterys, As long as they are the same volage it shouldn't matter. Also in my younger years when I madeing some VW dune buggys I was installing 12 volt batterys on 6 volt starters and never burned one up.


#3

C

chance123

How many batteries (cells)? Are they in series? Or parallel. By not putting the cells in the correct orientation, could/would double or triple (depending how many total cells) the voltage going to the motor. A golf cart has 6 (or 8) 6 volt batteries wired together in series giving a total of 36 or 48 volts. If you take all 6 (or even 8) of these 6 volt batteries wired together in "parallel", you still have only 6 volts. You need to know the specs of the motor (operating voltage/amps) then add the voltage of "each" cell times the quantity of cells to add up to the motor specs.
Perhaps your battery is/was a self contained replacement? Not enough information was given, so I just threw out some thoughts.
A flash light with 2 AA 1 1/2 volt batteries equals 3 volts


#4

reynoldston

reynoldston

This is getting confuseing?? Are we talking about more then just one 12 volt battery?? or just more amps.


#5

C

cmm1200

Two 12 volt-22amp batteries were used. Stock batteries were 17amp. This a Black and Decker CMM1200 mower.


#6

C

chance123

In some cases there are several cells in a 12v battery, almost like your car has 6 cells @ 2v each = 12v. Those cells are in series (internally) giving the 12v.
If you were using stock replacement batteries that have a connector that can't be reversed or mis-connected, your voltage would be correct and the amps would only give a longer use time. If you mis connected only "one" of those 12v batteries, it would be outputting 24v! Many people I know will take apart a sealed battery and get individual cells and make their own 12, 16, 24 or what ever voltage is required. I did this with my grandsons small electric Jeep. The battery was shot and hard to find new, so I made him one, but instead of 12v, I put in a couple extra cells and boosted it to 16v. He loves it. It really flys. LOL


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