1986+ Mercury 6/8/9.9/10/15HP 2-stroke Factory Service Manual, Page 177Get this manual

POWERHEAD
MEASURING PISTON
1Measure piston skirt at right angle (90) to piston pin centerline
2.54mm (0.10 in

Standard Piston Diameter 1994 689.9 1994 1015 1995 and newer 68 9.91015 53.92mm (2.123 in 60.27mm (2.373 in 53.92mm (2.123 in, 60.27mm (2.373 in

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