32C1D8CF-B8D1-4728-85ED-841E938C08C4.jpegMotor: 2000 mercury 150 hp Optimax
serial number: OT143550
Upon removing my spark plugs today, I noticed cylinder #3 threads appears to have a piece missing. Threads appear to be missing from the cylinder head, spark plug itself is intact. Have not changed plugs in a couple years so has probably been this way for quite some time. Is this something to be concerned about?