855545 Mercury COLLAR

Illustration 1 g00479965
System Schematic For Starting Motor Relay (SMR)The starting motor remains engaged or the starting motor continues to run after the engine has started.
Check setpoints.This step checks setpoints P11 (crank terminate speed), P17 (total cycle crank time) and P18 (cycle crank time).
Make a note of setpoints P11, P17 and P18. See Systems Operation, "Engine/Generator Setpoint Viewing OP2".
Compare the setpoints that are viewed with the specified setpoints of the particular generator set. The default value for P11 is 400 rpm. The default value for P17 is 90 seconds. The default value for P18 is 10 seconds.Note: Engines that are equipped with prelube pumps may require cycle crank times of 30 seconds or more.Expected Result: The setpoint value that is viewed and the specified setpoint value should agree.Results:
OK: Proceed to next Step 2.
NOT OK: The setpoint that is viewed does not agree with the specified setpoint. Reprogram setpoints P11, P17 and P18. See Systems Operation, "Engine/Generator Programming OP5". Proceed to next step.
Check the engine starting function.For the steps that remain in this procedure, the fuel system must be disabled.
Disable the engine ECM in order to prevent the engine from starting but not from cranking. Remove the "C key" on the J1 40-pin connector.
Prepare to manually stop the engine from cranking. Turn the battery disconnect switch OFF or manually stop the engine.
Turn the ECS to START and allow the engine to crank.
Turn the ECS to OFF/RESET.Expected Result: The engine should stop cranking.Results:
OK: Proceed to 6.
NOT OK: The engine continues to crank. Proceed to next step.
Check the engine starting function. The conditions of 2 remain. The fuel delivery is disabled and the engine is cranking.
While the engine is still cranking from the preceding step, push the emergency stop push button.Expected Result: The engine should stop cranking.Results:
OK: Check the wire on RM-18 of the relay module. RM-18 could be shorted to B+. If a short is not found, replace the relay module. See Testing And Adjusting, "Relay Module - Replace". STOP.
NOT OK: The engine continues to crank. Proceed to next Step 4.
Check the engine starting function. The conditions of 3 remain. The fuel delivery is disabled and the engine is cranking.
Stop the engine. Turn the battery disconnect switch to the OFF position or manually stop the engine.
Remove all wires from terminals TS1-25 in the generator housing. For dual starting motors, remove all the wires from terminal TS1-26.
Turn the ECS to the START position and attempt to crank the engine.Expected Result: The engine should not crank.Results:
OK: The engine does not crank. Therefore, the starting motor magnetic switch (SMMS) or related wiring is faulty. Troubleshoot the SMMS and the related wiring. See Testing And Adjusting, "Schematics & Wiring Diagram". STOP.
NOT OK: The engine continues to crank. Proceed to next Step 5.
Check the engine starting function. The conditions of 4 remain. The fuel delivery is disabled and the engine is cranking.
Stop the engine. Turn the battery disconnect switch to the OFF position or manually stop the engine.
Disconnect the B+ wire on the pinion solenoid of the starting motor.
Turn the ECS to START and attempt to crank the engine.Expected Result: The engine should not crank.Results:
OK: The engine does not crank. Therefore, the wire 304-WH-10 and/or the wire 314-PU-10 in the engine harness are shorted to the battery B+. Troubleshoot the wiring. See the "Generator Set Wiring Diagram" in Testing And Adjusting, "Schematics And Wiring Diagrams". If this does not fix the problem, proceed to Step 6.
NOT OK: The engine continues to crank. Therefore, the starting motor is faulty. Troubleshoot the starting motor. Refer to the Starting Motor Manual. Refer to Engine Service Manuals. If this does not fix the problem, proceed to Step 6.
Check the starting motor cycling.This step continues troubleshooting from 2. The conditions of 2 remain. The fuel delivery is disabled.Turn the ECS to the START position.
Expected Result: The starting motor should cycle on and off according to setpoint P18 (cycle crank time).Results:
OK: If the starting motor cycles correctly, the problem is not present. STOP.
NOT OK: If the starting motor remains ON, the starting motor is faulty. Troubleshoot the starting motor. Refer to the Starting Motor and/or Engine Service Manuals. STOP.