861321 Mercruiser LINE, Fuel

Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
The Electronic Control Module (ECM) contains no moving parts. Replacement of the ECM can be costly. Replacement can also be a time consuming task. Follow the troubleshooting procedures in this manual in order to ensure that replacing the ECM will correct the problem. Use these procedures to ensure that the ECM is the cause of the problem.Note: Ensure that the ECM is receiving power and that the ECM is properly wired to the negative battery circuit before you attempt to replace the ECM. Refer to the circuit Troubleshooting, "Electrical Power Supply - Test".Some application software supports the use of a new ECM as a test ECM. A new ECM can be temporarily placed into a "Test ECM Mode". This ECM can then be used to replace a suspect ECM in order to determine if the suspect ECM is faulty. Refer to service Troubleshooting, "Test ECM Mode".Note: When a new ECM is not available, you may need to remove an ECM from an engine that is not in service. The ECM must have the same serial number suffix. Ensure that the replacement ECM and the part number for the flash file match the suspect ECM. Be sure to record the parameters from the replacement ECM. Use the "Copy Configuration ECM Replacement" function in Caterpillar Electronic Technician (ET).
If the flash file and engine application are not matched, engine damage may result.
Perform the following procedure in order to replace the ECM.
Connect Cat ET to the diagnostic connector.
Use the "Copy Configuration ECM Replacement" function from the electronic service tool. If the "Copy Configuration" is successful, proceed to Step 4. If the "Copy Configuration" failed, proceed to Step 3.Note: Record any Logged Faults and Events for your records.
Record the following parameters:
Record all of the parameters on the "Configuration" screen.
Record all of the parameters on the "Throttle Configuration" screen.
Record all of the parameters on the "Mode Configuration" screen (if applicable).
Record the serial numbers of the electronic unit injectors. The injector serial numbers are shown on the "Injector Trim Calibration" screen.Note: If the parameters cannot be read, the parameters must be obtained elsewhere. Some parameters are stamped on the engine information plate, but most parameters must be obtained from the TMI data on "SIS Web".
Remove electrical power from the ECM.
Remove the suspect ECM and install the replacement ECM. Refer to Disassembly and Assembly, "Electronic Control Module".
Download the flash file.
Connect Cat ET to the diagnostic connector.
Select "WinFlash" from the "Utilities" menu of the electronic service tool.
Select the downloaded flash file.
If necessary, use Cat ET to clear the rating interlock. To clear the rating interlock, enter the factory password when Cat ET is first connected. Activating the "Test ECM" mode will also clear the rating interlock.
Use Cat ET to program the parameters. Perform the following procedure.
If the "Copy Configuration" procedure was successful, use the "Copy Configuration, ECM Replacement" function to load the configuration file into the ECM.Note: During the following procedure, factory passwords may be required.
If the "Copy Configuration" procedure failed, configure the parameters individually. The parameters should match the parameters from step 3.Perform the "Fuel System Verification Test".
Check for logged diagnostic codes. Factory passwords are required to clear logged events.