5.3.1.3 Each metallic fuel tank as installed shall allow water to drain from the top surface when the personal
watercraft is in its static floating position.
5.3.1.4 Each fuel tank support, chock or strap that is not integral with a metallic fuel tank shall be insulated
from the tank surface by a material that does not absorb moisture.
5.3.1.5 Cellular plastic shall not be the sole support for a metallic fuel tank.
ISO/DIS 13590:2001
6 © ISO 2001 – All rights reserved
5.3.2 Plastic encased fuel tanks
5.3.2.1 Each fuel tank encased in cellular plastic foam or in fibre reinforced plastic shall have the connection
and fittings accessible for inspection and maintenance.
5.3.2.2 If a metallic fuel tank is encased in cellular plastic or in fibre reinforced plastic, water shall not collect
between the plastic and the surface of the tank or be held against the tank by capillary action.
5.3.2.3 If the plastic is bonded to the surface of a metallic fuel tank, the adhesive strength of the metal to
plastic bond shall exceed the cohesive strength of the plastic.
5.4 Fuel tank fill system
5.4.1 Each fuel fill opening shall be located so that when the personal watercraft is in its static floating position, a
petrol overflow of up to 19 l/min for at least 5 s will not enter the personal watercraft.
5.4.2 Each hose in the tank fill system shall be secured to a pipe, spud or hose fitting by a method that prevents
leaks and prevents the hose from becoming disconnected.
5.5 Fuel pumps
5.5.1 Each diaphragm fuel pump shall not leak fuel into the personal watercraft if the primary diaphragm fails.
5.5.2 Each electrically operated fuel pump shall not operate except when the engine is operating or when the
engine is being started.
5.6 Carburettors
Each carburettor shall not leak externally more than 5 cm3 of fuel in 30 s when:
— the float valve is open (if applicable);
— the carburettor is at half throttle and;
— the engine is cranked without starting or the fuel pump is delivering the maximum pressure specified by its
manufacturer (if applicable).
5.7 Fuel stop valves
Each electrically operated fuel stop valve in a fuel line between the fuel tank and the engine shall open electrically
only when the ignition switch is on.
5.8 Fuel filters and strainers
Each fuel filter and strainer shall be supported on the engine or watercraft structure independent from its fuel line
connections, unless the fuel filter or strainer is inside a fuel system component.
5.9 Spud, pipe and hose fitting
Except when used for a tank fill line, each spud, pipe or hose fitting used with hose clamps shall have a bead, flare
or a series of annular grooves or serration no less than 0,4 mm in depth.
5.10 Clips, straps and hose clamps
5.10.1 Each clip, strap, and hose clamp shall be of a corrosion resistant material and not cut or abrade the fuel
line.
5.10.2 Hose clamps, when used, shall be used with hose designed for clamps.
ISO/DIS 13590:2001
© ISO 2001 – All rights reserved 7
5.10.3 Hose clamps, when used, shall be beyond the bead or flare, or over the serration of the mating spud, pipe
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