Is it something to worry about engine still running after i turn motor off?

If your engine continues to run after turning off the ignition, it could indicate a problem such as a faulty ignition switch, stuck throttle, or engine run-on (dieseling). While it might not always lead to immediate damage, it is a sign that something isn't functioning correctly and should be checked by a mechanic. Ignoring the issue could lead to more significant problems down the line, so it's best to address it promptly.