Mercury 305 CID, Service Manual, Page: 688 / 967

ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5E-147 90-823225--1 1096
Throttle Body Injection
System Description
Service Precautions
! WARNING
Always disconnect battery cables from battery
BEFORE working on fuel system to prevent fire
or explosion.
! WARNING
Be careful when cleaning flame arrestor and
crankcase ventilation hoses; gasoline is ex-
tremely flammable and highly explosive under
certain conditions. Be sure that ignition key is
OFF. DO NOT smoke or allow sources of spark or
open flame in area when cleaning flame arrestor
and crankcase ventilation hoses.
! WARNING
Be careful when changing fuel system compo-
nents; gasoline is extremely flammable and high-
ly explosive under certain conditions. Be sure
that ignition key is OFF. DO NOT smoke or allow
sources of spark or open flame in the area while
changing fuel filter(s). Wipe up any spilled fuel
immediately.
! WARNING
Be sure that the engine compartment is well ven-
tilated and that no gasoline vapors are present to
avoid the possibility of fire.
! WARNING
Make sure no fuel leaks exist before closing en-
gine hatch.
! CAUTION
Fuel pressure MUST BE relieved before servicing
any component in the fuel system.
! CAUTION
DO NOT operate engine without cooling water
being supplied to seawater pump or water pump
impeller will be damaged and subsequent over-
heating damage to engine may result.
The following information MUST BE adhered to
when working on the fuel system:
•
Always keep a dry chemical fire extinguisher
at the work area.
•
Always install new O-rings when assembling
fuel system parts.
•
DO NOT replace fuel pipe with fuel hose.
•
Always relieve system fuel pressure prior to
servicing any component in the fuel system.
•
DO NOT attempt any repair to the fuel system
until instructions and illustrations relating to
that repair are thoroughly understood.
•
Observe all Notes and Cautions.