1995 Johnson Evinrude "EO" 90 CV 85 thru 115 Service Manual, P/N 503150, Page 32Get this manual

1995 Johnson Evinrude "EO" 90 CV 85 thru 115 Service Manual, P/N 503150, Page 32

Tune-Up Procedure 1Visually inspect engine for leaks, missing or loose parts, or the obvious defects2Compression checkProper
operates poorly, check for: scored cylinder walls damaged pistons stuck piston rings worn piston rings IF the engine shows
variation greater than 15 PSI (100 kPa) check for: damaged head gasket damaged pistons broken or stuck piston rings scored
cylinder wallsIF the engine has equal compression and runs normally, continue the tune-up procedure Clean and regap or replace
spark plugsMake certain ceramic portion of plug is not crackedReplace if cracked to prevent sparksInspect and test ignition
componentsSee Section 3Replace deteriorated or damaged parts such as wires, boots, etc which may emit sparks 11 5Replace
in-line fuel filterReplace deteriorated or damaged fuel system parts such as hoses or gaskets which may result in fuel leaksInspect