The hotter the water gets the better the engine runs because the gasoline vaporizes more readily and the engine will use less gasoline. The cylinder is cooled by the water circulating around it and the heat passes off in the form of steam, so if the water boils, you need not be alarmed. Keep the cylinder properly lubricated and the reservoir full of water and there will be no danger of your engine overheating. IN COLD WEATHER DRAIN THE RESERVOIR AT NIGHT TO PREVENT FREEZING.

TO START IN COLD WEATHER.

All gasoline engines will start with more difficulty during cold weather than in warm weather, because gasoline does not vaporize as readily in cold weather. You can overcome any difficulty from this cause in starting by pouring a couple of gallons of warm water in the water reservoir; this warms up the cylinder and the gasoline will vaporize more readily. (Be careful if engine is real cold not to use water too hot, as the sudden change may crack the cylinder.) It is also advisable to open the fuel valve further than you generally do, and be sure to close the air damper when starting; also put a teaspoonful of gasoline in the cylinder through the priming cup. Work the intake valve in and out before starting in cold weather, as this will remove any frost that may have collected on the valve stem and allow valve to work easily.

HOW TO ADJUST THE FUEL VALVE.

The mixing valve (Figure 2) is of the suction feed type, gasoline being drawn from the tank in the base by the suction of the piston. The air and gasoline are mixed in this valve to form the explosive gas.

When you start the engine, open the fuel valve two full turns to the left, close the air damper and turn the fly wheel to the right; this draws a supply of gasoline, from the tank and primes the valve. After the engine is running, open the air damper and close the fuel valve slowly until the point is reached where the engine runs with the least number of explosions and without black smoke appearing at the exhaust, or a popping sound at the mixer, the latter being caused by an insufficient supply of fuel, and smoke at the exhaust by too much fuel.

If it is ever necessary to take the mixing valve and feed pipe off the engine, be very careful not to lose the valve out of the check valve, because if this valve is not in place your engine will not get any gasoline. To drain gasoline from tank remove pipe plug.

OUT OF GASOLINE.

If the engine is running all right with the fuel valve set at the right point, and it starts to misfire, runs irregularly and explodes through the air inlet or gasps for breath, the supply of gasoline is low and the tank should be refilled.

-5-