Purging Air From Fuel Injectors (Bleeding) - Mercury MerCruiser D2.8L D-Tronic Service Manual

FUEL INJECTORS

Purging Air From Fuel Injectors (Bleeding)

In most cases the design of the EDI System will prevent needing to purge air from the fuel
lines and injectors. Draining and replacing the water separating fuel filter should include
purging air from the new filter, but not usually from the fuel lines, injectors or system.
Overheating from insufficient cooling water will cause engine and drive system
damage. Ensure that there is sufficient water always available at water inlet holes
during operation.
1. Supply cooling water to water inlet.
To prevent damage to starter motor, Do NOT use for more than 15 seconds at one
time. Allow at least 2 minutes for starter motor to cool before reusing.
2. Put on safety glasses.
3. Slightly loosen each injection pipe sleeve nut.
4. Crank the engine with the starter motor.
NOTE: Engine may attempt to start when fuel appears at sleeve nuts.
5. When an air free stream of fuel appears at sleeve nut, tighten nut. Continue until all
injectors are purged and sleeve nuts are tightened.
Typical
6. Torque sleeve nuts to 17 Nm (156 lb-in.).
Page 5C-16
a - Sleeve Nut
CAUTION
CAUTION
a
17 mm
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002
70148