825753 2 Mercury ECU, Engine Control Unit

Table 1
Required Tools
Tool Part Number Part Description Qty
A 370-8376 Capping Kit 1
Ensure that all adjustments and repairs that are carried out to the fuel system are performed by authorized personnel that have the correct training.Before beginning ANY work on the fuel system, refer to Operation and Maintenance Manual, "General Hazard Information and High Pressure Fuel Lines" for safety information. Refer to System Operation, Testing, and Adjusting, "Cleanliness of Fuel System Components" for detailed information on the standards of cleanliness that must be observed during ALL work on the fuel system.
Turn the battery disconnect switch to the OFF position.
Turn the fuel supply to the OFF position.
Illustration 1 g03398172
Loosen bolt (3) that secures Original Equipment Manufactures (OEM) wiring harness assembly (1) to electronic control module (5). Disconnect the (OEM) wiring harness assembly from the electronic control module. Position the (OEM) wiring harness assembly away from the electronic control module.
Loosen bolt (8) that secures engine wiring harness assembly (7) to electronic control module (5). Disconnect the engine wiring harness assembly from the electronic control module.
Cut cable strap (2) (not shown) and cable strap (9) that secures engine wiring harness assembly (7) to electronic control module (5). Note: Note position of cable straps that attach the wiring harness assemblies to the electronic control module.
Position engine wiring harness assembly (7) away from electronic control module (5).
Make temporary identification marks on plastic fuel line (4) and plastic fuel line (6) in order to show the correct position of the plastic fuel lines.
Place a suitable container below electronic control module (5) in order to catch any fuel that might be spilled.
Remove plastic fuel line (6) and drain the fuel from electronic control module (5). Use Tooling (A) to plug plastic fuel lines (6). Position the plastic fuel line away from the electronic control module.
Use Tooling (A) to cap the connection on the electronic control module (5).
Disconnect plastic fuel line (4). Use Tooling (A) to plug the plastic fuel lines. Position the plastic fuel line away from the electronic control module.
Use Tooling (A) to cap the connection on the electronic control module (5).
Illustration 2 g03398173
Remove bolts (10) and remove washers (11) and washer (17) (not shown). Take care to prevent damage to ground connection (16). Note: Support the weight of the electronic control module as the bolts are removed.
Remove electronic control module (5) from mounting bracket for the electronic control module. Note: Note the orientation of the electronic control module.
If necessary, follow Step 15.a through Step 15.c in order to disassemble electronic control module (5).
Remove connection (14) and remove O-ring seal (15) (not shown). Use Tooling (A) to cap connection (14) and plug electronic control module (5).
Remove connection (18) and remove O-ring seal (19) (not shown). Use Tooling (A) to cap connection (17) and plug electronic control module (5).
Remove isolation mounts (12) and limit sleeves (13) from electronic control module (5). Installation Procedure
If a replacement electronic control module is installed, the module must be programmed with the correct information. Refer to Troubleshooting Guide, "Replacing the ECM" and refer to Troubleshooting Guide, "Flash Programming" for the correct procedure.
Ensure that the electronic control module is clean and free from damage. If necessary, replace the electronic control module.
Illustration 3 g03398173
If necessary, follow Step 3.a through Step 3.f in order to assemble electronic control module (5).
Remove the cap from connection (14). Install a new O-ring seal (15) (not shown).
Remove the cap from connection (18). Install a new O-ring seal (19) (not shown).
Remove the plugs from electronic control module (5).
Install connection (14) and connection (18) to electronic control module (5). Tighten the connections to a torque of 18 N m (159 lb in).
Install isolation mounts (12) and limit sleeves (13) to electronic control module (5).
Install washers (14) to bolts (16). Ensure that ground strap (16) for the electronic control module is clamped between washer (17) and washer (14).
Position electronic control module (5) on the mounting bracket for the electronic control module. Loosely install bolts (10) to the isolator mounts (12). Note: Ensure that the electronic control module is correctly oriented.
Tighten bolts (10) to a torque of 22 N m (195 lb in). Note: Ensure that the ground strap is not strained as the bolt is tightened.
Illustration 4 g03398172
Remove the plugs from plastic fuel line (4) and plastic fuel line (6).
Remove caps from the connections on electronic control module (5).
Connect plastic fuel line (4) and plastic fuel line (6) to electronic control module (5).
Connect engine wiring harness assembly (7) to electronic control module (5). Tighten bolt (8) to a torque of 6 N m (53 lb in). 5Note: Care must be taken in order to avoid damage to the connector pins during installation of the harness.
Install new cable strap (2) (not shown) and new cable strap (9) to engine wiring harness assembly (7). Note: Ensure that the cable straps meet the Original Equipment Manufactures (OEM) specifications.
Connect OEM wiring harness assembly (1) to electronic control module (5). Tighten bolt (3) to a torque of 6 N m (53 lb in).
Turn the fuel supply to the ON position.
Turn the battery disconnect switch to the ON position.
Remove the air from the fuel system. Refer to Operation and Maintenance Manual, "Fuel System - Prime" for the correct procedure.