[. . . ] Particularly important information is distinguished in this manual by the following notations. WARNING Failure to follow WARNING instructions could result in severe injury or death to the machine operator, a bystander, or a person inspecting or repairing the machine. [. . . ] Beware of water-hammering Do not allow the wheel of a vehicle to run over the delivery hose. Do not close the delivery valve abruptly, because a water-hammer will occur which may result in heavy damage to the pump. Do not put your hands or foreign objects in the release or valves when the pump is in use. Water inside casing freezes at below 0°C (32°F) in winter and there by pump may possibly break. (Refer to instruction manual of engine) Sticking of impeller (Disassemble & clean) Entrance of air at suction side (Check piping at suction side) Drop of engine output (Repair) Breakage of mechanical seal (Replace mechanical seal) High suction lift (Lower) Thin or long or kink of hose (Thicken or shorten or straighten) Leak of water from water passage (Stop leak) Clogging of foreign substance in impeller (Disassemble & clean) Wear of impeller (Replace impeller) Suction of air at suction side (Check piping at suction side) Insufficient priming water inside pump casing (Prime fully) Imperfect tightening of drain cock (Tighten the 2 plugs completely) Imperfect revolution of engine (Repair engine) Entrance of air from mechanical seal (Replace mechanical seal) Remove spark plug, and with its metal part touching the cylinderhead, try to Do sparks fly in spark plug?If compression is low, check the tightness of the spark plugs and other members, and tighten all loose members. If compression is still low, have a qualified service shop check the engine. Set combination control lever to "CHOKE", pull the starter handle several times and remove spark plug. If the end of the spark plug is wet with fuel, Is fuel sucked into the cylinder?When fuel is properly sucked and still the engine can not be started, try with new fuel. The specifications are subject to change without notice for the purpose of product improvement. The specifications are subject to change without notice for the purpose of product improvement. [. . . ] Keep the engine at least 3 feet (1 meter) away from buildings or other structures. Keep the engine away from flammables and other hazardous materials (trash, rags, lubricants, explosiver). [. . . ]