Replaced my sparkplugs this weekend and was wonder how these old ones looked. They are all about the same with one side a little lighter than the other. Engine has about 50 hours and these are the original plugs.
Also, the gap on the old once were .025" and I gapped the new ones at .033".
Engine 2005 250 XS
fastglass1
2000 Stroker
2005 250XS
30+ Performer 3 and 30 Performer 4
Those look good for that number of hours runtime. You obviously don't spend TOO much time at idle/low RPM.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
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You are right there.Most of my time is around 4500 rpms. Prop is set for 5900 rpm max.
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