1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 173Get this manual

1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 173

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POWERHEAD

aFeeler gaugeSurface plateEven downward pressure 2 Overheating: Overheating is visible as bluish bearing surface color that is caused by inadequate lubrication or excessive RPM3