1995 Johnson/Evinrude Outboards 25, 35 3-Cylinder Service Manual, Page 32Get this manual

1995 Johnson/Evinrude Outboards 25, 35 3-Cylinder Service Manual, Page 32

Tune-Up Procedure 1Visually inspect engine for leaks, missing or loose parts, or the 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
Clean and regap or replace spark plugsMake certain ceramic portion of plug is not crackedReplace if cracked to prevent sparks
4Inspect 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,