FUEL INJECTION DESCRIPTIONS AND SYSTEM OPERATION
SERVICE MANUAL NUMBER 24
FUEL INJECTORS
The injector assembly is a solenoid operated device, controlled by the ECM, that meters
pressurized fuel to the intake manifold. The ECM energizes the injector solenoid, which
opens a ball valve, allowing fuel to flow past the ball valve, and through a recessed flow di-
rector plate.
The director plate has six machined holes that control the fuel flow, generating a conical
spray pattern of finely atomized fuel at the injector tip. Fuel is directed at the throttle, causing
it to become further atomized before entering the intake manifold.
a
b
c
d
73773
a - Fuel Injector
b - Fuel Filter
c - Seal Ring
d - Fuel Meter Body
FUEL PRESSURE REGULATOR
The pressure regulator is a diaphragm-operated relief valve with fuel pump pressure on one
side, and regulator spring pressure on the other. The regulator’s function is to maintain a
constant pressure differential across the injectors at all times. The regulator is located on
the cool fuel assembly. Refer to “Fuel Delivery” Section of this manual.
a
71716
a - Fuel Pressure Regulator
Index
Page 5D-28
90-861327 OCTOBER 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 305 CID, Mercury MerCruiser 350 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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