Yamaha Marine Outboards F4A/F4 Factory Service Manual, Page 38Get this manual
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GENERAL SPECIFICATIONS
kg (lb) kg (lb) kW (hp) rmin rmin (U,S, gal, Imp gal)h rmin
22 (48.5) 23 (50.7) 2.9 (4) 4,500 4,0005,000 1.6 (0.42, 0.35)5,000
cm3 (cuin) mm (in)