SAEJ1223V002

3.6The carburetor shall be capable of accommodating all pressures up to and including 0.05 MPa (7.5 psig)

supply pressure without unseating the float mechanism.

The throttle body shall be capable of accommodating all pressures up to and including 0.34 MPa (50 psig)supply pressure without leakage from the injector and regulator assemblies.

Environmental Conditioning for Leakage Test

The carburetor or throttle body shall be subjected to a storage temperature of –29 °C (–20 °F) for 48 h andreturned to room temperature.

The carburetor or throttle body shall be subjected to 1000 cycles of 13 to 17 g peak vertical accelerations at arate of 80 cycles or less per minute with the duration at the base of the half-sine shock pulse a minimum of6ms, with the carburetor or throttle body in its normal operating position.

After the shock test described in 4.2, the steady-state fuel delivery shall not change more than ±5% and nostructural or mechanical failure of components is permissible.

The carburetor or throttle body shall be mounted on an intake manifold, or sealed flange, with its flamearrestor, fuel, and vacuum lines attached (or line openings closed) and shall be subjected to a 96 h salt spraytest at 35°C (95 °F) per ASTM B 117, using a 5% salt solution.

During the 96 h test, all linkage is to be cycled once during each 24 h interval.

After testing per 4.3, all moving parts shall operate without loss of function.

Leakage

There shall be no more than 5 cm3 of fuel leakage external to the carburetor or throttle body and its airinduction system in 30 s when:

The carburetor fuel inlet shut-off valve is fixed in its full-open flow condition or the throttle body injectors areenergized to flow continuous fuel; and

Throttle plates are fixed at mid-position between closed and full-open. In the case of multiple throatcarburetors or throttle bodies having secondary throttle plates slaved to primary throttle plates, the primaryplates may be positioned so as to allow the secondary plates to open no more than 50% to prevent fuelaccumulation; and

The engine is cranked without starting for 30 s.

Identification

Evidence of compliance with this document shall be indicated by the marking “SAE J1223” together with theword “Marine” arranged in any suitable manner.

Marking should be as permanent in nature as practicable.3.74.4.14.24.2.14.34.3.14.3.25.5.15.1.15.1.25.1.36.6.16.2

PREPARED BY THE SAE MARINE ENGINE FUEL SYSTEMS SUBCOMMITTEE OF THE

SAE MARINE TECHNICAL COMMITTEE

-2-