1989 Johnson Evinrude "CE" 9.9 thru 30 Service Manual, P/N 507754, Page 172Get this manual
lower square ringsInstall each square ring on its pistonWith the ring fully seated in its groove, make several checks around the piston The side clearance must not exceed 0.004 in(0,10 mm) 1441 12Use feeler gauge to check groove side clearance on the
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 the straightedge does not touch piston, remove the ring and clean ring grooveAssembly Proceed slowlyMake no forced assemblies unless pressing operation is called forAll internal components must be perfectly clean and lightly coated with Johnson or Evinrude Outboard Lubricant
1461 1If removed, place two long water deflectors and one