I've read if a aviation spark plug is ever dropped to drop it again in the trash. Never understood what part on the spark plug gets damaged and why It can't be inspected visually or with a ohm meter to test if it was damaged. Reason I'm asking is I have a vibration issue at idle up to about 900 rpms. My engine is freshly overhauled o320 with new plugs but I did drop one or two of them. Above 900 rpms the engine is smooth. I have a engine monitor. Is there anything specific to look at to indicate if a spark plug is damaged. My mags were overhauled by myself with all new internals except the coil. My coil ohms out fine, but could it be the problem as well?
Thanks
Bill
Thanks
Bill