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Mercury Racing 540 8.6L (523cu.in)


Mercury Racing 540 8.6L (523cu.in)

Old 06-27-2020, 09:40 PM
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Join Date: Jul 2013
Location: Jeff City MO.
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Default Mercury Racing 540 8.6L (523cu.in)

I searched the site and tried my google foo but I cannot find a user manual or any discussions on service interval specifically when is it time to refresh the upper end. I can't really find any info on what changed from 525 to 540 so maybe they all fall into the 200 hour time frame for upper end refresh? I did find older threads with Eddie Young talking about the 525.

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