The moving conditiotns affecting the occurrence of miss-firing in 2 cycle farm engine were studied by means of the gradual reduction of the value of inserted parallel resistance of spark plug until the miss-firing occurs in the cylinder.
The results obtained are as follows:
The occurrence of miss-firing tends to become hard, inspite of the increase of electric leakage passing through the spark plug, under the conditions such as the increase of burdened load, the decrease of spark gap, the increase of r.p.m. of engine, the decrease of the amount of mobile oil mixed with gasoline, and the increase of the ratio of air: fuel mixture in the sphere of practical use. Under each condition mentioned above, the more durability to miss-firing can be recognized at the higher cylinder temperature.