46 CFR § 119.410 - General requirements.
(a) Each starting motor, generator, and spark producing device must be mounted as high above the bilges as practicable.
(b) Gauges to indicate engine revolutions per minute (RPM), jacket water discharge temperature, and lubricating oil pressure must be provided for all propulsion engines installed in the vessel. The gauges must be readily visible at the operating station.
(c) In systems and applications where flexible hoses are permitted to be clamped:
(1) Double hose clamping is required on each end of the hose, where practicable, except that one hose clamp can be used if the pipe ends are expanded or beaded to provide a positive stop against hose slippage;
(2) The clamps must be of a corrosion resistant metallic material; and
(3) The clamps must not depend on spring tension for their holding power.