Cool Fuel System Repair; Removal - MerCruiser 305 CID (5.0L) Service Manual

FUEL DELIVERY SYSTEM FOR ELECTRONIC FUEL INJECTION
Water Separating Fuel Filter Replacement
Refer to "Precautions," in this section, BEFORE proceeding.
1. Disconnect battery cables from battery.
2. Remove fuel filter from base. A filter wrench may be needed.
3. Lubricate sealing ring(s) of new filter with engine oil.
4. Install new filter. Tighten securely by hand.
5. Reconnect battery cables.
6. Supply water to cooling system.
7. Start engine.
8. Check for fuel leaks.

Cool Fuel System Repair

Removal

1. Disconnect battery cables from battery.
IMPORTANT: Suitably plug open ends of fuel line connections to prevent fuel leaks
and entry of water or contaminates into lines while working.
2. Close fuel shutoff valve, if equipped. and remove the fuel tank inlet line from the water
separating fuel filter. If boat is not equipped with a fuel tank shut off valve, remove the
fuel tank inlet line at the water separating fuel filter and plug the line.
If boat is to remain in the water, the seacock, if equipped, must remain closed until
engine is to be restarted to prevent water from flowing back into seawater cooling
system. If boat is not fitted with a seacock, water inlet hose must be disconnected
and plugged to prevent water from flowing into cooling system and/or boat. As a
precautionary measure, attach a tag to the ignition switch or steering wheel with the
warning that the seacock must be opened or the water inlet hose reconnected prior
to starting the engine
3. Close seacock, if equipped. If boat is not equipped with a seacock, remove and plug the
seawater inlet hose.
4. Drain seawater system. Refer to SECTION 1B.
5. Disconnect seawater hoses from fuel cooler.
Index
Page 5C-10
NOTICE
CAUTION
SERVICE MANUAL NUMBER 24
90-861327--1 OCTOBER 1999