2009 Yamaha F40 Outboard Service Manual, Page 172Get this manual
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Fuel system Float height (reference data): 30.7 mm (1.21 in)
Float chamber plate screw c: Nm (0.2 kgfm, 1.5 ftlb)
Float height b: 42.1 2.0 mm (1.66
2 Install the needle