PARTS OF FOUR-CYCLE MOTOR (Jump Spark, Air-cooled) R, Timer Shaft S, Timer SP, Spark Plug T, Fly-wheel U, Fly-wheel Locknut V, Fly-wheel Key W, Ball Thrust X, Valve Gear Y, Valve Cam Z, Valve Push-rod Roller ZA, Valve Push-rod VE, Exhaust Valve VEF, Exhaust-valve Foot VIG, Inlet-valve Stem Guide EXPLANATION OF FIG. 40 (Parts of Two-cycle Make-and-break System) A, Spark Plug B, Movable Electrode C, Electrode Rocker Arm D, Electrode Spindle E, Electrode Spindle Bushing F, Angular Dog G, Trip Adjusting Screw H, Plunger I, Plunger Thimble J, Plunger Spring K, Rocker-arm Spring L, Dog Spring M, Slide Bar N, Slide-bar Guide O, Ecccentric and Eccentric Rod P, Pump Q, Pump Plunger |