1996 Mercury Force 25 HP Service Manual 90-830894 895, Page 41Get this manual
CHECKING FOR RESTRICTED FUEL FLOW CAUSED BY ANTI-SIPHON VALVES FIRE AND EXPLOSION HAZARDObserve fire prevention rules, particularly NO SMOKINGDrain 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 and fittings, must be inspected for corrosion or any sign of leakage or deterioration which will necessitate replacement before further engine operationWhile anti-siphon valves are helpful from safety stand-point, they clog, they may be too small, or they may have too heavy springThe pressure drop that occurs with these valves can create operational problems andor powerhead damage by restricting flow of fuelSome symptoms of restricted (lean) fuel flow, are: