Why do your engine drag when trying to start?

Could be flat or very low battery - check with a good meter, it should show at least 11.9 volts at rest. Check both terminals are clean and tight. Check ground wire where it's bolted to the frame for clean and tight.

A fully charged battery will read 12.6 volts with the engine off. At 75% charge it will read 12.4 volts, at 50% it will read 12.2 volts, & at 25% charge it will read 12 volts. Any less and the battery is basically dead. Must be checked with a digital volt meter. It may also be the engine is to slow in time. Can also be the starter is failing.