Re: Rectifier
That the 9 amp system as the 16amp does not use the small three post rectifier on this model. Some models came with a optional voltage regulator. If you have this installed, here is how to test it.
Testing:
1. Check battery voltage at battery with engine running.
2. If battery voltage is above 14.5 volts, replace voltage regulator. Check condition of battery as overcharging may have damaged battery.
3. If battery voltage is below 14.5 volts, charge battery. If battery can NOT be satisfactorily
charged, replace battery.
4. If battery accepts a satisfactory charge, check battery voltage while cranking engine; If
cranking voltage is not acceptable, replace battery.
5. If cranking voltage is acceptable, disconnect end of RED wire (located between rectifier (+) terminal and starter solenoid) from rectifier. Secure RED wire (from voltage regulator) to rectifier (+) terminal with hex nut.
6. Connect RED (+) ammeter lead to (+) terminal of rectifier and BLACK (?) ammeter lead to RED wire (disconnected in last step).IMPORTANT: For accurate test results the voltage
at battery with engine running, in next step, must be 13.5 volts or less. It may be necessary to operate electrical accessories to drop voltage to 13.5 volts or less.
7. Run engine at 3000 RPM.
8. Meter should read between 7 - 9 amperes.
9. If meter reads 7 - 9 amperes, this indicates the charging system is functioning properly and the
battery is being discharged because the amperage draw on the system is greater than the amperage output of the system.
NOTE: With engine running at the following RPM?S, the ammeter should indicate the following approximate amperes:
RPM AMPERES
IDLE 1
1000 4
2000 8
3000 9
10. If the meter reads less than 7 amperes, test the stator; refer to ?Standard Stator (Alternator Coils) Amperes Output?, following. If stator tests OK, replace voltage regulator.