2000-2005 Yamaha F40B Outboard Service Manual, Page 46Get this manual
MAINTENANCE SPECIFICATIONS
Model Worldwide Unit F40BMHO, WHO F40MH mm (in) mm (in) mm (in) mm (in) F40BEO, F40BET F40ER, F40TR
USA, Canada PISTONS
Piston-cylinder clearance Piston side "0" Measuring point "H" Pin boss inside diameter
0.0350.065 (0.00140.0026) 64.95064.965 (2.55702.5573) (0.007) 15.97415.985 (0.62890.6293)
Oversize piston diameter
mm (in) mm (in) mm (in)
+ 0.25 (0.001)0.50 (0.002)
15.96515.970 (0.62850.6287)
PISTON PINS
Diameter
PISTON RINGS
Top ring