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I have a 02 big bear 400. It will run if I pull start it but it won't start by the button. Also when I turn the key on instead of nuetral light coming on I get the red oil temp light. When I do have it running by pulling it the key will turn it off. I thought the battery but I have it hooked up to a battery charger still nothing, and I've put a differnt push button set up on it and still didn't work and still no nuetral light just oil temp. ?????
 

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What is the voltage of the battery? If the battery is bad, a charger will not fix it.
Anything less than 12.5 volts is bad on a freshly charged battery. Best bet is to have it load tested.

When you touch the starter button, what actually happens?
 

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X2 on what Dezz said , the pull start requires very little power to fire the engine but the starter takes a lot. It sounds like a weak battery or bad connection to me. The starter could be a problem if it's drawing too many amps but not likely.
 
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