Page:Motors and motor-driving (1902).djvu/202

170 through the end of the crank-shaft; a bad 'back fire' may cause this pin to sheer off or bend and jam the tongue. The novice should be shown the way to get at this mechanism so as to know how to renew the pin or tongue. If the starting gear fails at an awkward moment, the car may be started by putting in the third or fourth speed and pushing the car with the friendly aid of a few lookers-on.

We will now pass on to Part II., dealing with possible troubles encountered on the road, dividing this section into—

1. Motor stops.

2. Motor nearly stops and then goes on again.

3. Motor will not pull well.

4. Motor will not govern or 'cut out' properly.

5. Unusual noises.

This may be divided into—

A. Overheating.

B. Starvation of carburator.

C. Carburator flooded.

D. Burners going out.

E. Mechanical reasons.

A. Overheating.—The most serious cause of a stoppage on the road is undoubtedly overheating, which causes the lubrication to burn up and the piston to expand and grip or ' sei/e ' in the cylinder. This matter of overheating should now be divided into its various causes, viz.:—