Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Have you ran a compression test? What is the battery voltage when starter is activated?
Full engine model number?
Run compression test and check battery voltage when starter is engaged.
80 to 100 psi is ok. 150 the ACR is broken.
80 to 100 psi and battery voltage below 8 volts, battery or cables are the problem.