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I was attempting to spray fogging oil into each cylinder, and the last 2 on the port side in the back the oil just dripped back out, and upon further investigation, there is a substance in each cylinder, and it is like semi solid, and in my photo, you can even see where the electrode of the spark plug was setting. The plugs were not burned or anything, but I was not able to get a photo of the spark plugs These are the spark plug holes. The boat did have issues running beyond like a 10 mph idle the last couple seasons used, so this was obviously the issue, do you think I need to tear down to the cylinder? can this stuff be vacuumed out? Has anyone seen this before?
