1991 Johnson Evinrude 9.9 Thru 30 HP Models Service Manual P/N 507946, Page 152Get this manual

1991 Johnson Evinrude 9.9 Thru 30 HP Models Service Manual P/N 507946, Page 152

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6 Check piston with micrometer to determine if piston has distorted during assembIyMeasure the piston at two places, 90 from each other, to in(3,2 to 6,4above bottom edge of the skirtIf the difference

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