Gasoline Engine Instructions
If Engine Dies Down After Starting
LACK OF FUEL
See that there is proper amount of fuel in tank.
Examine spark plug to be sure you are getting a good spark. Remove it, but leave it connected to the wire, place it against the side of cylinder, trip the magneto, (see page 10, paragraph 5). If you do not get a good spark clean the spark plug. See that the points on the plug are not farther than the thickness of a thin dime apart, next examine the magnet post in the bottom of the magneto body, remove all dirt or rust from these posts if you fail to get a spark. (See page 48.)
If Engine Has No Power
Have you advanced spark; that is, have you placed spark lever No.403 back in running position after you have started engine?
Make certain that the magneto trips when the word "spark", which you will find stamped on the rim of the flywheel, is opposite top of cam rod.
If magneto does not trip at right time loosen set screws Nos. Yl5 or Y586 (see pages 36 and 37) and lengthen or shorten the distance the latch finger has to travel by adjusting castings Nos. K198-B and 0198-B with adjusting screw No. Y460, (see pages 36 and 37).
The greater percentage of causes of lack of power can be traced down to a poor mixture. If the charge is not mixed properly, it makes a slow burning mixture which will, in most cases, cause back-firing, owing to the charge burning so slowly that it fires the incoming charge, which, of course, would naturally escape back through the mixer on account of inlet valve being open.
Owing to the variance in atmospheric conditions, there is no certain point at which the needle valve may be adjusted; however, if you will carefully watch action of engine and adjust it at a point at which the engine runs most regularly, and without excessive exhaust, you will have no trouble along this line.
If you are using kerosene oil, make certain that you are feeding the proper amount of water to carburetor. Too much water will cut down the power; too little water makes a poor mixture, which burns slowly, resulting in late combustion, which beside causing a loss of power, and leaving an excessive deposit of carbon on the cylinder wall, heats up the engine to such an extent that a pounding results, commonly called pre-ignition. This pounding can always be nearly eliminated by feeding a little water to carburetor. Pre-ignition is indicated by a deep, heavy sound and is generally either caused by a poor mixture, hot cylinder or a red hot deposit in cylinder.