Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
What happened to the first battery? Do you have a voltmeter to check battery voltage now? Is the charging system working?
New battery can be bad! But need to be sure the charging system is working. Check battery voltage before start, then after engine is running, voltage has to increase as least one volt, you can test with jumper if you need to, just do not have donor running.