changed my plugs after having a “loading up” issue last summer. Two have a minor amount of oil on them and were fouled. ZR6 with 334 hours. Does not use oil but seemed to be overfill on oil quite a bit from previous owner. Changed oil to normal level and new plus and have not had any other issues. Can to much oil lead to blow by past the rings and or a PCV valve issue? I HIGHLY doubt this boat already has a valve issue and/or shot piston rings.
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