1994 Johnson/Evinrude "ER" 9.9 thru 30 outboards Service Manual, Page 183Get this manual

1994 Johnson/Evinrude "ER" 9.9 thru 30 outboards Service Manual, Page 183

1431 9Measure the piston diameter in at least two places to verify piston conditionMake your measurements 18 to 1f4 in(3,2
with the wrist pin hole centerlineThe minor diameter must be smaller than the major diameter by the cam dimension See the
chart -Major Diameter Cam Dimension Vendor Standard 2.9956 in(76,11 mm) in3.0266 in(76,88 mm) Standard 2.9969 in(76,12 mm)
+ 0.030 in3.0269 in (76,96 mm) 0.006 0.001 in (0,15 0,03 mm) 0.002 0.0005 in(0,05 0,01 mm) Zollner Art, Rightway PCE0073
1441 10lfthe grinding on the sides ofthe piston is worn smooth in pattern similar to the illustration, replace the piston1451