Hi, homeowner here with an 07 Scag Tiger Cub, 48" deck, 19hp Kawasaki motor that I bought new. I started it up earlier and made it about a minute before it died. It acted like it was running out of gas. Tried to restart it but just got a click sound. Got a new battery in it and now it just makes a loud, single click sound when I try to start it. The motor does not turn over at all. What should I check and how hard is it to get to?