Lawn mower battery jump start off the Ram??
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R1, your analogy is very poor, 12 to 6 volt isn't anything like AC to DC current! If you did try jumping a 6 volt off a 12 nothings gonna happen to truck but a 6 volt starter is another thing... that may exceed the starters capability and possibly other circuits on the mower depending on how advanced the circuitry is on that thing. As far as charging goes, some battery chargers can charge both 6 and 12 volt batteries, but the ones I'm familiar with have a switch to go from 6 to 12, I'm not saying that you can't do it, I wouldn't be surprised to see a charger the reads the battery you are charging and applies the correct voltage, but I'd check the manual first. Some of those mowers can get up there in price now days and I wouldn't try to just rig something that may or may not work without knowing before hand.
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If it's actually a 6-volt system, you can melt stuff. The system has certain resistance based on the combination of all of the components. Current (amps) draw is voltage divided by resistance. So, if you double the voltage you will double the current draw (roughly, it's not a purely resistive system).
Think of what would happen if you tried hooking up driving lights to the wires that are used to run your dash lights (not as extreme, but the concept is there).
As an additional note, the electrical system of a lawn mower isn't going to have all the nifty filters and other systems to "clean" the power. You could backfeed really noisy power back into your truck and make your electronics very unhappy.
I would think twice about trying to jump start a lawn mower, even if it was a 12 volt system. If you really need to do it, disconnect the ground wire on the truck battery and just use it as a booster battery. The truck battery by itself (without the truck running) would have more than enough power to get the lawn mower going even if the lawn mower battery was dead.
Think of what would happen if you tried hooking up driving lights to the wires that are used to run your dash lights (not as extreme, but the concept is there).
As an additional note, the electrical system of a lawn mower isn't going to have all the nifty filters and other systems to "clean" the power. You could backfeed really noisy power back into your truck and make your electronics very unhappy.
I would think twice about trying to jump start a lawn mower, even if it was a 12 volt system. If you really need to do it, disconnect the ground wire on the truck battery and just use it as a booster battery. The truck battery by itself (without the truck running) would have more than enough power to get the lawn mower going even if the lawn mower battery was dead.
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I guess I never looked and just assumed it was a 6 volt It is a 12 volt and I just connected up my charger to it and it's working fine after about 4 hours on it. Thanks for the help.
I just remember my grandfathers being a 6 volt for such a small motor so I just thought mine was the same. Thanks
I just remember my grandfathers being a 6 volt for such a small motor so I just thought mine was the same. Thanks