Cause Too rich or too weak a mixture. Loose, dirty, worn, wet, or Go over every wire and connec- Remedy Clean and overhaul plug. Use a plug long enough to reach well into cylinder but not so long that it will strike piston or valves. Have thread in cylinder clean. See that wire connection is clean and tight. If points are badly worn or burnt use a new plug. If points are rusty, corroded, or sooty, smooth with fine emery cloth. Always have several plugs on hand and as soon as trouble is traced to plug replace with a new one; the old one may be repaired at any time. Clean and oil timer. Take up lost motion and, if necessary, try a new timer. Adjust so that contact is made just after end of compression stroke when spark is retarded. Look over rods, gears, shafts, etc. Replace any weak or worn springs and any old, worn fibre. Trouble Valves. Slow action. Loss of Water in crank chamber. Water in carburetor. Loud explosions. Steam from exhaust. Slow or ir Cause Cam-shaft gear badly set, worn, Sooty or gummy deposits on Leaky joints in jacket, at head, Remedy Clean valve stems by free use Provide a strainer in pipe line. CHAPTER IX GLOSSARY OF ALPHABETICALLY ARRANGED TECHNICAL TERMS USED IN CONNECTION WITH GASOLENE ENGINES, WITH EXPLANATIONS.-VARIOUS USEFUL TABLES; HEAT VALUE OF FUELS; SIZE AND CAPACITY OF TANKS; IRON-PIPE SIZES; DRILL SIZES FOR SCREW HOLES; UNITED STATES STANDARD SCREW THREADS; CAP-SCREW SIZES; FINDING SURFACE AND VOLUME. GLOSSARY OF TECHNICAL TERMS Accelerator-Any attachment or device for increasing speed. Advanced Spark—An electrical spark produced to ignite a charge of gas in a motor before the piston reaches the upward limit of its compression stroke. Air Lock-A gathering of air in a pipe which prevents the flow of liquid through the same. Annular-Pertaining to or in the form of a ring. Annular Bearing—A bearing in the form of a ring. Annular Opening-A ring-shaped opening. Ampere A unit of electrical measurement nearly analogous to quantity. Ampmeter (Ammeter)—An instrument for indicating or measuring amperes. Armature-A wire coil around an iron core used in producing electricity between two magnets, as in a dynamo. Atmosphere-The weight, or pressure, of air, equivalent to 15 pounds per square inch. Babbitt-A composition of various soft metals used as bearings to overcome friction. Bearings made from babbitt. Backfiring-The backward or premature explosion of a gas engine. Baffle Plate—A plate or partition to turn or stop the flow or force of gases or other matter. Balance Weight-A weight attached to a crank, shaft, or wheel, to balance the explosive force of the motor and lessen vibration, as well as to overcome the tendency to a dead centre. |