Hi there,
I have a 1988 Evinrude 140 V4. Everything seems to be running perfectly. The Tachometer is working fine, the boat starts first time every time and never misses a pulse. The problem I do have however is that the battery never seems to be/get fully charged. I have replaced the battery, checked it is the correct size. It doesn't seem to run flat it is just that it never seems to get fully charged either.
I have tried to follow the Manual and have done the following checks and tests:
The battery voltage is 12.45VDC.
The resistance between the yellow and yellow/grey wires of the stator when disconnected form the rectifier is 0.9ohms and the resistance from the stator wires to earth is an open circuit.
If I run the engine at idle or approximately 1000RPM and test the voltage form the yellow wire to ground momentarily I get approximately 10 volts and if I do the same from the yellow/grey wire I get approximately 8 volts.
I'm not sure weather this next test is relevant to my type of Rectifier/Regulator but I have Disconnected the rectifier leads at the terminal board. Connected one ohmmeter lead to a good earth on the rectifier and the other lead to one of the yellow or yellow/grey leads observing the meter reading (Approximately 2.5meg ohms) I have then reversed the connections with the following results again (Approximately 2.5meg ohms). I have also done this test using a diode tester and get nothing in either direction.
However I do wonder if this test is relevant to my type of 9amp stator combined with the Rectifier/Regulator?
I have now just aquired a decent ammeter so will try connecting one ammeter lead to the positive terminal of the starter solenoid and the other to the red and purple wires that I will disconnect then run the engine to check the results.
If anyone out there has any ideas it would be very much appreciated as this is proving difficult to troubleshoot via the proper procedure. Is there possibly an easier way?
Regards Mike
I have a 1988 Evinrude 140 V4. Everything seems to be running perfectly. The Tachometer is working fine, the boat starts first time every time and never misses a pulse. The problem I do have however is that the battery never seems to be/get fully charged. I have replaced the battery, checked it is the correct size. It doesn't seem to run flat it is just that it never seems to get fully charged either.
I have tried to follow the Manual and have done the following checks and tests:
The battery voltage is 12.45VDC.
The resistance between the yellow and yellow/grey wires of the stator when disconnected form the rectifier is 0.9ohms and the resistance from the stator wires to earth is an open circuit.
If I run the engine at idle or approximately 1000RPM and test the voltage form the yellow wire to ground momentarily I get approximately 10 volts and if I do the same from the yellow/grey wire I get approximately 8 volts.
I'm not sure weather this next test is relevant to my type of Rectifier/Regulator but I have Disconnected the rectifier leads at the terminal board. Connected one ohmmeter lead to a good earth on the rectifier and the other lead to one of the yellow or yellow/grey leads observing the meter reading (Approximately 2.5meg ohms) I have then reversed the connections with the following results again (Approximately 2.5meg ohms). I have also done this test using a diode tester and get nothing in either direction.
However I do wonder if this test is relevant to my type of 9amp stator combined with the Rectifier/Regulator?
I have now just aquired a decent ammeter so will try connecting one ammeter lead to the positive terminal of the starter solenoid and the other to the red and purple wires that I will disconnect then run the engine to check the results.
If anyone out there has any ideas it would be very much appreciated as this is proving difficult to troubleshoot via the proper procedure. Is there possibly an easier way?
Regards Mike