854143 Mercruiser O-RING

Do not allow dirt to enter the fuel system. Thoroughly clean the area around a fuel system component that will be disconnected. Fit a suitable cover over disconnected fuel system component.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Dispose of all fluids according to local regulations and mandates.
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Note: Place identification marks on all hoses for installation purposes. Plug all hoses and all the ports in the fuel filter base. Plugging hoses and ports helps prevent fluid loss, and plugging hoses and ports helps to keep contaminants from entering the fuel system.
Table 1
Required Tools
Tool Part Number Part Description Qty
A 491-1265 Capping Kit 1
Turn the fuel supply to the OFF position.
Illustration 1 g06131483
Typical example
Illustration 2 g06131492
Typical example
Illustration 3 g06131535
Typical example
Disconnect the inlet hose (not shown) from inlet elbow (5). Use Tooling (A) to cap the ports.
Loosen hose clamp (7) and disconnect hose (8) from elbow (6). Use Tooling (A) to cap the ports.
If necessary, remove fuel filter element (1). Refer to Operations and Maintenance Manual, "Fuel System Filter - Replace" for the correct procedure.
Remove bolts (4) and remove fuel filter base assembly (3) from mounting bracket (13).
If necessary, remove bolts (14) and remove mounting bracket (13).
If necessary, follow Step 7.a through Step 7.d to remove relief valve (2).
Loosen the hose clamp on the fuel return hose (not shown) and disconnect the hose from relief valve (2). Use Tooling (A) to cap the ports.
Loosen clamp (10) and disconnect hose (8) from the relief valve. Use Tooling (A) to cap the ports.
Remove bolt (9).
Loosen clamp (11) and disconnect the relief valve from hose (12). Use Tooling (A) to cap the ports.
Illustration 4 g06131971
Typical example
If necessary, follow Step 8.a through Step 8.d to remove elbow (5) and elbow (6) from fuel filter base (3).
Loosen lock nut (15) and remove elbow assembly (6) from the fuel filter base.
Remove O-ring (17) and washer (16).
Use Tooling (A) to cap the elbows and plug the open ports on the fuel filter base.
Repeat Step 8.a through Step 8.c for the remaining elbow (5).Installation Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Ensure that the fuel filter base and the bracket are clean and free from damage. If necessary, replace any component that is worn or damaged.
Illustration 5 g06131535
Typical example
If necessary, position bracket (13) onto the cylinder block and install bolts (14). Tighten the bolts to a torque of 26 N m (230 lb in).
Illustration 6 g06131971
Typical example
If necessary, follow Step 3.a through Step 3.d to assemble the fuel filter base.
Install new washer (16) and new O-ring seal (17) to elbow (6)
Install elbow assembly (6) to fuel filter base (3).
Ensure that the elbow is aligned in the correct position. Tighten locknut (15) to a torque of 24 N m (212 lb in).
Repeat Step 3.a through Step 3.c for the remaining elbow (5).
Illustration 7 g06131483