National Standards For Outboard Motors
The national standard of small boat outboard motor portable fuel system has the following specific contents:
1 Scope
This standard specifies the design, material and test requirements for portable fuel systems with a rated capacity equal to or less than 27L for outboard motors installed on boats with a length of 24m or less for carrying and storing flammable liquids.
This standard does not apply to pressure fuel systems.
2. Definition
2.1 Flammable liquid
The flash point is lower than 60°C (closed cup test), and at 38°C, the Ricci gasification pressure is lower than 280kPa (absolute pressure) of the liquid.
2.2 Portable fuel tank
A fuel tank used to carry and store flammable liquids with a capacity equal to or less than 27L, which will become part of the portable fuel system.
2.3 Portable fuel system
It is used to connect with the fuel system on the outboard engine, and is a system composed of a portable fuel tank with a fuel filler cap, a vent, a fuel connector, a fuel pipe and related accessories.
3. General requirements
3.1 The portable fuel tank should be designed to be easy to move and fix on the boat, and easy to disassemble when refilling outside the boat.
Note: "Portable fuel tank" is hereinafter referred to as "fuel tank".
3.2 The total volume of the fuel tank should be at least 5% of the rated capacity expansion space at the normal refueling position at 20°C. The opening position of the fueling port should not block the expansion space when the mailbox is in its normal fueling position.
3.3 A vent pipe that can be closed automatically or manually should be provided in the portable fuel oil system.
3.4 For fuel tanks using unleaded gasoline, the minimum inner diameter of the fuel filler neck should be 21.5mm, and the maximum inner diameter should be 23.5mm. For fuel tanks using other fuels, the inner diameter of the fuel filler neck should be greater than 30mm.
3.5 When the fuel tank is in normal use or storage position, all openings of the fuel tank should be higher than the fuel level, and should have a liquid-tight and air-tight cover.
3.6 The fuel tank should be designed to be carried with one hand.
3.7 The shape of the fuel tank should not be easy to stack.
3.8 The configuration of materials used in portable fuel oil systems should minimize their galvanic corrosion under normal marine conditions.
3.9 The synthetic rubber material of the plastic box should contain anti-ultraviolet agent.
3.10 The color of the fuel tank should be red.
3.11 The fuel tank should have a symbol indicating which fuel is used in the well-known system.
3.12 When metal materials are used to make fuel tanks, welding materials with a melting point lower than 450°C should not be used.
3.13 If the boat is equipped with a portable fuel system for outboard motors, the owner’s manual should include the contents listed in Appendix A (reminder). See Appendix B (Noted Appendix) for the owner's manual.
4. Identification
There are corresponding signs with the following:
a) Manufacturer's logo or name;
b) Nominal capacity, L;
c) Star mark;
d) Year of manufacture expressed by numbers or codes;
e) GB/T 18571, the minimum height of characters should be 4mm;
f) Symbol of fuel type, the minimum height is 25mm;
g) Fire protection symbol, the minimum height is 25mm