Bad starter?

[BL1 70 roadrunner]

I was in my garage and I tried to start my roadrunner. The car sputtered so I poured some gas down the carb tried again and it sounded like the battery was dying. I put a battery charger on it for about 8 hours at 10 amp and tried again. This time it was turning over then made a single loud click noise. I tried it again and same thing it turned over then the click noise. I'm thinking that its the starter. What do you guys think? I know I need to replace the battery but even when I tried to start it when the engine was warm it was always hard starting.

 

[Big John]

Sounds like the battery. You say you know you need one anyway... so replace it and see what happens.

 

[BL1 70 roadrunner]

Ya that's what I was planning on, I'm goning to swap the battery's between my charger and the roadrunner and see where it takes me