Electrode Mounted On Bottom Of Transom Assembly; Electrodes Mounted On Boat Transom - Mercury BRAVO Service Manual

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SERVICE MANUAL NUMBER 28

4. Immerse Electrode Tester in the water within 6 in. (150 mm) of aft end of sterndrive unit.

IMPORTANT: There will be different voltage readings depending on the type of Mer-

Cathode System you are testing.

5. The following readings indicate that the sterndrive unit is adequately protected:

6. If the reading is not within specified limits, or if reading is within specifications but there

90-863160 MAY 2000

Electrode Mounted on Bottom of Transom Assembly

a. MODELS WITH ELECTRODES MOUNTED ON BOAT TRANSOM

Fresh Water Areas -

7.5 - 10.5 millivolts with Quicksilver

750 - 1050 Millivolts with Digital Meter

Salt, Polluted or Mineral Laden Water Areas:

8.8 - 10.5 millivolts with Quicksilver

880 - 1050 Millivolts with Digital Meter

b. MODELS WITH ELECTRODE MOUNTED ON BOTTOM OF TRANSOM ASSEMBLY

Fresh Water Areas -

6.2 - 11.8 Millivolts with Quicksilver

620 - 1180 Millivolts with Digital Meter

Salt, Polluted or Mineral Laden Water Areas:

7.5 - 11.8 Millivolts with Quicksilver

750 - 1180 Millivolts with Digital Meter

is evidence of corrosion on sterndrive, refer to the following troubleshooting charts to

aid in diagnosis.

CORROSION PROTECTION - ALL MODELS