Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 42Get this manual
SPEC POWER UNIT
Item CYLINDER HEAD Warpage limit CYLINDER Bore Wear limit Taper limit Out of round limit
MAINTENANCE SPECIFICATIONS
MAINTENANCE SPECIFICATIONS
Unit Model F4AF4 0.1 (0.004) 59.0059.02 (2.3232.324) 59.1 (2.33) 0.08 (0.003) 0.05 (0.002) 26.73626.836 (1.05261.0565) 26.53226.623 (1.04421.0481) 21.95022.050 (0.86420.8681) 21.95022.050 (0.86420.8681) 14.93414.984 (0.58800.5899) 0.03 (0.001) 7.9657.980 (0.31360.3142) 0.5 (0.02)
mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in)
CAMSHAFT Intake (A) Exhaust (A) Intake (B) Exhaust (B) Camshaft diameter(journal) Camshaft round limit VALVE LIFTER Outside diameter PUSH ROD Runout limit VALVES Valve clearance (cold) Intake Exhaust