1995 Johnson/Evinrude Outboards 9.9, 15 four-stroke Service Manual, Page 30Get this manual

1995 Johnson/Evinrude Outboards 9.9, 15 four-stroke Service Manual, Page 30

Tune-Up Procedure 1Visually inspect engine for leaks, missing or loose parts, or other obvious defects2Compression checkProper
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 walls IF the engine has equal compression and runs normally, continue the tune-up procedure
3Clean and regap or replace spark plugsMake certain ceramic portion of plug is not crackedReplace if cracked to prevent sparks4Inspect
and test ignition componentsSee Section 3Replace deteriorated or damaged parts such as wires, boots, etc which may emit sparks
5Replace in-line fuel filterReplace deteriorated or damaged fuel system parts such as hoses or gaskets which may result in
fuel leaksInspect carburetor and primer system6Synchronize the engineSee Synchronization and Linkage Adjustments, this section&