2000-2005 Yamaha F40B Outboard Service Manual, Page 42Get this manual
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ISPEC IU POWER UNIT
CYLINDERS Bore size Taper limit
Out-of-round limit
mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in) mm (in)
65.00065.015 (2.559