1994 Johnson/Evinrude "ER" CV 85 thru 115 outboards Service Manual, Page 145Get this manual

1994 Johnson/Evinrude "ER" CV 85 thru 115 outboards Service Manual, Page 145

1441 10Use micrometer to check piston conditionMake at least two measurements, 90 from each otherMeasure the piston diameter
side clearance on the lower, square ringsInstall each square ring on its pistonWith the ring seated in its groove, make several
checks around the piston The side clearance must not exceed 0.004 in(0,10 mm) 1471 13Use machinist's straightedge to check
clearance on the upper Pressure-Back ringsInstall each Pressure-Back ring on its pistonWhen checked with the straightedge,
there should be enough ring clearance to allow the straightedge to touch the piston on both sides of the ring grooveMake
several checks around the piston If straightedge does not touch piston, remove the ring and clean ring grooveAssembly Proceed