Once on the support page, look for a search bar labeled "Find Your Product" or "User Manuals."
Equus (now Innova) no longer directly lists the 4320 on its main support site, as it is a legacy model. However: equus 4320 manual pdf
Manual solution: This is normal for worn distributor cam lobes or loose point plate. The manual explains how to interpret the average reading. Also check your engine ground connection. Once on the support page, look for a
Follow this checklist to get the most out of your manual: Once on the support page