2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 47Get this manual
ISpecifications
Model Unit
USA Item Canada Worldwide Margin thickness (D) Intake Exhaust Stem diameter Intake Exhaust Guide inside diameter Intake and exhaust Stem-to-guide clearance Intake Exhaust Stem runout limit Valve springs
F50AEHD
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) mm (in) mm mm mm mm (in) (in) (in) (in)
F50TH F50AEHT
F50TR F50TR F50AET
0.6-1.0 (0.024-0.039) 0.7-1.1 (0.028-0.043) 5.48-5.49 (0.2157-0.2161) 5.46-5.47 (0.2150-0.2153) 5.50-5.51 (0.2165-0.2169) 0.01-0.03 (0.0004-0.0012) 0.03-0.05 (0.0012-0.0020) 0.03 (0.0012) 39.85 (1.569) 37.85 (1.490) 1.7 (0.07) 15.985-15.998 (0.6293-0.6298) 36.000-36.024 (1.4173-1.4183) 0.016-0.040 (0.0006-0.0015) 1.500-1.504 1.496-1.500 1.492-1.496 1.488-1.492 (0.0591-0.0592) (0.0589-0.0591) (0.0587-0.0589) (0.0586-0.0587)