1995 Johnson/Evinrude Outboards 50 thru 70 3-cylinder Service Manual, Page 155Get this manual

1995 Johnson/Evinrude Outboards 50 thru 70 3-cylinder Service Manual, Page 155

[] 9Use micrometer to check piston conditionMake at least two measurements, 90 from each otherMeasure the piston diameter
ring end gapThe ring end gap must be within: Recreational Models0.019-0.031 in(0,48-0,79 mm) Commercial Models0.010-0.022
in(0,25-0,56 mm) [] 11 Use machinist's straightedge to check clearance on the tapered ringsInstall one tapered ring in the
piston's upper ring grooveWhen 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