772 



Popular Science Monthly 



pedal pin is ground as in Fig. 3 — an old 

 broken pin will do — and is turned into the 

 bent crank-arm. This is intended to catch 

 into the toothed band when starting the 

 engine. The sprocket on the right crank- 

 arm is removed and an old bicycle sprocket 

 put in its place after its rim has been 

 taken off and the unnecessary spokes cut 

 out. A hole is drilled in the end of the spoke 

 B, Fig. 4, for the spring C. The ends of 

 the other spokes are fitted with the pins 

 projecting ^ in., as shown at D, Fig. 2. 



The spring E is made of about No. 14- 

 gage brass spring wire and its function is 

 to pull the catch F against the toothed 

 band when the starter pedal is pushed for- 

 ward. It will take some experimenting to 

 obtain the right adjustment for this spring 

 so that it will perform its duty properly. 



the inside edge comes to about ^ in. out- 

 side of the opening through which the 

 clutch extends. This ^ in. of the chain 

 guard is then hammered back against the 

 stop iron. The hole is thus made larger to 

 provide space for the added circumference 

 to the clutch when the toothed band is put 

 on its outer surface. 



The lower stop, Fig. 6, is made of metal 

 ^ in. wide and 3^ in. thick. This is 

 riveted to the piece at 7, Fig. 5. A stop 

 bolt J, Fig. 6, is put on as shown to 

 keep the starter-arm from turning past its 

 throwing position. The band / and the 

 guard are held firm at the lower part with a 

 U-shaped piece of iron K, Fig. 2. This 

 piece is bolted to the engine bracket. A 

 spring Fig. 7 is made of No. 8-gage brass 

 wire and is fastened on with the stop, as 



Side views of the engine crankcase showing the location of the kick pedal and the pedal 

 lever for the brake and clutch with connecting rods and details of the footboards 



The spring C, Fig. 4, is held to the frame 

 with a clamp at G. 



The stops for the left starter-arm are 

 placed on the ends of a bar of metal made 

 as follows: The piece is about 23 J^ in. 

 long, % in. wide and 34 in. thick. It is 

 shaped as shown in Fig. 5. This metal 

 piece is riveted to the chain guard so that 



shown at L, Fig. 5. Its purpose is to hold 

 the starter-arm in position when not in use. 

 The foot pedal M of the starter is shown in 

 Fig. 2 and 4. It is made by putting a 

 sleeve over a bolt that has been threaded to 

 fit in the end of- the arm. An ordinary 

 bicycle pedal may be used instead, which 

 will give a better appearance. 



