1989 Johnson Evinrude "CE" 9.9 thru 30 Service Repair Manual, P/N 507754, Page 171Get this manual
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f"41l 9 Measure the piston diameter in at least two places to piston conditionMake your measurements 18 to V4 in(3,2 to 6,4 mm) above the bottom edge of the piston skirtThese engines have pistons of s