1979 Evinrude Outboard 9.9/15 HP Service Repair Manual Item No. 5426, Page 31Get this manual
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fPoint end of fuel hose into container below top of tankDepress the ll in the fuel connector until any remaining fuel is expelledgAdd air to bl'ing pressUl'e back to 10 psi (69 kPa)hClose ail' release