1993 Johnson Evinrude "ET" 90 degrees CV Service Repair Manual, P/N 508285, Page 141Get this manual
Quality of the image is intentionally reduced!
1441 10 Use micrometer to check piston conditionMake at least two measurements, 90 from each otherMeasure the piston diameter 14 in(6,4 mm) above the bottom edgeRefer to Engine Specifications, Section