Mercathode - Mercury 2.8 Diesel Operation & Maintenance Manual

7. Inspect the sterndrive ground plate for loose or broken connections.
a
8. Inspect the continuity washers under the hydraulic manifold block fasteners for a loose or faulty connection.
9. Inspect the sterndrive U‑joint bellows ground clips and exhaust tube ground clip for loose or faulty connections.
a

MerCathode

If the boat is equipped with a MerCathode system, the system should be tested to ensure that it is providing adequate output to
protect the underwater metal parts on the boat. The test should be made where the boat is moored, using a Reference
Electrode and Test Meter.
Reference Electrode
90-8M0113987 DECEMBER 2015
eng
a - Sterndrive‑to‑bell housing ground plate
27264
19627
Senses and electrical current in the water when testing the MerCathode system. Use to check hull
potential.
9188
a - Continuity washers
a
9957
Exhaust tube ground clip shown, U-joint bellows ground clips similar
a - Exhaust tube ground clip
91‑76675T 1
Section 4 - Maintenance
Page 77