Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 58Get this manual
INSP ADJ CHAPTER PERIODIC INSPECTION AND ADJUSTMENT
MAINTENANCE INTERVAL CHART .3-1 PERIODIC SERVICE.3-2 INSPECTION AND ADJUSTMENT .3-2 FUEL SYSTEM .3-2 Fuel tank and fuel line .3-2 Fuel cock.3-2 Fuel joint.3-2 Fuel filter replacement 3-2 CONTROL SYSTEM.3-3 Throttle cable .3-3 Idling speed (for USA).3-3 Idling speed (except for USA) 3-4 Start-in-gear protection adjustment 3-5 POWER UNIT .3-5 Engine oil level 3-5 Engine oil replacement .3-6 Valve clearance 3-7 Checking the spark timing 3-8 T.C.Iair gap adjustment .3-9 LOWER UNIT .3-10 Gear oil .3-10 Lower unit leakage check3-10 GENERAL .3-11 Anode .3-11 Spark plug 3-11 Compression pressure measurement .3-13 Grease points.3-14