1978 Evinrude Outboards 9.9/15HP Service Manual, Page 65Get this manual
ness or binding by rolling the ring around the piston ring grooveSee Figure 5-29Check for groove side clearance with feeler gageSee Figure 5-30Correct gap and side clearances are given in Section 2 REASSEMBLY OF POWER HEAD
Proceed slowlyMake no forced assemblies unless press fits are called for and make no "dry" assembliesBe sure all parts to be assembled are clean and free from dirt and gritPerfectly good cylinder walls, pistons and rings can be ruined in few minutes of operation unless all forms of grit are removed before assemblyWork in clean surroundings and with reasonably clean handsCoat all bearing surfaces, cylinder wallS, etc with clean oil before assemblyWhere the use of "oil" is specified, we recommend OMC Outboard LubricantNOTE Always use new gaskets and seals throughout when reassembling the power headMake certain all oil holes and passages are openPISTONS, WRIST PINS AND CONNECTING RODS aIf removed, press new roller bearings in connecting rods using bearing installer (Special Tool #319931)See Figure 5-31