Not Good Practice to Cut Off Ignition When Coasting
With ordinary driving conditions, on a short grade, it is not good practice to cut off ignition switch when coasting. The jerk and the sudden spinning of the engine when clutch is released, however gradually, shows that a strain is thrown on the driving mechanism. However, should the driver want to cool the engine on a long grade it is advisable to cut off the ignition.
In small quantities gasoline may be kept in a cool place. As there is always danger of vapor pressure in the can, it should be ventilated or closed with a spring. To prevent a dangerous accumulation of vapor there should be a free circulation of air.