(c) Due consideration must be given to the clean ing of the cylinder, valves and exhaust pipe as often as the quality of the fuel may necessitate.
(d) Portable engines should not be used where dust or inflammable flyings prevail, nor be located near combustible material.
Stationary Kerosene and Fuel Oil following regulations refer to engines using a fuel having a flash point above 100 degrees Fahrenheit: (31) Location of the Engine.—Same as for gas engines, described under heading 1, in paragraphs a, b, and c.
(32) Capacity and Location of Tanks.—These should conform to the Regulations for the Storage and Use of Fuel Oil in Class A, and under the head ing of 11 to 16, inclusive, of Class B. A copy of these rules will be sent you free of charge by the National Board of Fire-Underwriters.
(33) Fill and Vent Pipes.—See heading 12.
(35) Piping.—See heading 12.
(36) Ignition and Starting.—(a) Torches for pre-heating the combustion chamber of engines are to be used only while starting the engine, and the pressure on the supply reservoir is to be released as soon as the engine is firing properly.
(b) Torches used for initially heating the com bustion chamber must be of a type approved for use with kerosene.
(c) Gasoline, if used for starting engines, must be introduced as a fuel inside the cylinders and the supply of gasoline must not be more than necessary to produce a proper temperature for operating the en gine with the heavier fuel oils.
(d) The gasoline supply for engines using this liquid for starting must be drawn from an outside underground storage tank by means of a hand pump permanently attached to the engine in an approved feed cup or reservoir having a capacity of not more than 1 pint and provided with an overflow to the out side gasoline tank; or an approved reservoir of the lift out type may be used, provided the capacity is limited, as explained in paragraph c, above, but it must not exceed 1 gallon, and, further, that the re tention of any gasoline after the engine starts is au tomatically prevented.
(37) The Muffler or Exhaust Pot.—Same as de scribed under heading 4.
(38) The Exhaust Pipe.—Same as described un der heading 6. Water pockets in exhaust pipes to be provided with suitable means for drainage.
(39) The Engine .Room.—Same as described un der heading 7.
(40) Lubricating oa Drips and Pans.—Same as described under heading 8.
(41) Name Plate.—Same as described under head ing 9.
(42) Care and Attentions—Same as described un der heading 10.