Doing some maintenance on my 2011 200hp ProXS (sn in signature) and noticed some differences in the way the spark plugs looked on #4, #3 holes as they were tan on one side and black on the other. Also, #1 hole was tan, but was lighter than the rest. Pics for references.
Are these sooty plugs indicative of needing my injectors checked out? The motor has been running great. Always use the cocktail, and non ethanol fuel. It has around 210 hours on it.
Thanks for any advice.
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