THE MOTOR LATJXCH

is slow and a nuisance. Petrol fuel vaporises at ordinary temperatures,
and when the petrol and air enter the cylinders in proper proportions
an explosive mixture is at once formed.

PORT SIDE

AFTER END

GOVERNOR

AND
IMPULSE

STARBOARD SIDE
Fig. 6.—Kelvin Marine Motor for Ship's Life-boat.
Precautions.—To ensure the effective running of the engine it is
desirable that the pipes leading from the fuel tanks be fitted with a
fine wire gauze diaphragm to act as a strainer to keep back any sediment;