Q. When you get exhaust pipe explosions, what should you do?
A. Turn on the fuel till the exhaust is smoky. Then you know you have fuel enough and more than enough. If the explosions still continue, conclude that the igniter spark is too weak, or does not take place.
Q. What precaution must be taken in cold weather?
A. The water must be carefully drained out of jacket.
Q. Will common steam engine cylinder oil do for a gasoline engine?
A. No. The heat is so great that only a special high grade mineral oil will do. Any oil containing animal fat will be worse than useless.
Q. How can you tell if right amount of gas or gasoline is being fed to engine to give highest power?
A. Turn on as much as possible without producing smoke. A smokeless mixture is better than one which causes smoke.
Q. If you have reason to suppose gas may be in the cylinder, should you try to start cylinder?
A. No. Empty the gas all out by turning the engine over a few times by hand, holding exhaust open if necessary.