1990 Johnson Evinrude "ES" 9.9 thru 30 Service Repair Manual, P/N 507871, Page 145Get this manual

1990 Johnson Evinrude "ES" 9.9 thru 30 Service Repair Manual, P/N 507871, Page 145

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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 skirt vs