[colt54]

Hell all I have a 129 and 149, problem is starting. all connections are good and clean, and both have a new 350amp battery. But both tractors try to start and sometimes thye do but veary sluggish with poping through the carb. Now if I use a 600amp battery they start right up. Has anyone had this issus before?
I never rebuilt a starter/generator or have even taken one apart. But this is where im at.