The quick disconnect on the front of motor may be worn. You can check the seal, buy a new one or eliminate it entirely. A worn seal there can cause gas to leak ouy when you're priming it and air to leak in when the motor is running. It's an easy fix.
This would tie into a intermittent Idle issue I have been having.
I bought a new Quick Disconnect End. It fits snug. I was surprised to not find a rubber Seal on the end.