Indexing and gapping plugs on 2018 300XS
While I was at Silver Glenn last week I talked with Trace on S&F about his 300XS Intimidator. I was complaining about my engine surging while getting on plane and he told me a plug change/fuel filter change solved the same problem on his. I read everything I could about the IR-M plugs and found a video from Mercury Racing on indexing the plugs to get the maximum flow across the electrode.
I indexed my old plugs before removing them and found 4 out of 6 were indexed wrong and all of the had the wrong gap [.030 instead of .040].
I indexed the new plugs with the .040 gap. I also cleaned the stopped up inline strainer supplying cooling water to the compressor.
Hope to test tomorrow before the storm arrives later in the week.