Please Help...

[RRRUFF]

Sometimes the battery will check good and still not have enough amps and voltage. You still might need a new battery, don't rule that out just yet. Check your connections where the battery negative cable connects at the starter mount bolt. Also check that none of you crimp connectors are corroded.

 

[Brew]

You need to put a meter to your battery terminals and take a reading then turn the key on. What does it drop to? If it drops to 12.5 or lower its crap. If it stays at 12.5 or better try and start it with the meter connected and see what it drops to. Let us know all these values. It'll tell a lot...