Mercury Mariner 8/9.9HP 4-Stroke Factory Service Manual, Page 91Get this manual
WARNING FIRE AND EXPLOSION HAZARDObserve fire prevention rules, particularly NO SMOKINGBefore servicing any part of the fuel system, disconnect electrical system at the batteryDrain the fuel system completelyUse an approved container to collect and store fuelWipe up any spillage immediatelyMaterials used to contain spillage must be disposed of in an approved receptacleAny fuel system service must be performed in well ventilated areaFUEL LEAKAGE FROM ANY PART OF THE FUEL SYSTEM CAN BE FIRE AND EXPLOSION HAZARD WHICH CAN CAUSE SERIOUS BODILY INJURY OR DEATHCareful periodic inspection of the entire fuel system is mandatory, particularly after engine storageAll fuel components, including fuel tanks, whether plastic, metal, or fiberglass, fuel lines, primer bulbs, fittings, swelling, and must be inspected for corrosionAny sign of leakage or deterioration necessitates replacement before further engine operation