Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 52Get this manual
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SPEC Outboard dimension
B5 B6 B11 B12 C1 C2
mm (in) mm (in) mm (in) mm (in) mm (in) mm (in)
82.5 (3.25) 136 (5.35) 55 (2.17) 48 (1.9) 22 (0.87) 60 (2.36)