Not turning over

Hello, is the engine cranking slowly? Or sometimes not at all? This could be a sign off a battery concern. Low battery voltage can definitely be a root cause of concern causing the engine to not want to start. Hands on testing is needed to check the battery state of charge and the ability to sustain a load. Beyond that, you could have a starter motor issue, battery cabling issue, charging system issue. But - start with testing the basics.