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Message: <blockquote data-quote="z33tec" data-source="post: 482795" data-attributes="member: 25836">Thanks for the feedback guys. I do like to clean off plugs if I know they aren't that old, but I did read that if oil soaks into the ceramic for a while they may look clean and good but still not work well. I'm no scientist, so who knows, might just be someone's "theory". Sounds like best idea is to carry a spare set and maybe clean/rotate them every month or two ahead of schedule. Takes no time to do anyway.For what its worth, I pre-mix 50:1 on a 1990 70hp Johnson, so maybe its bigger of an issue than those running VRO's or something.</blockquote>