MerCruiser 3.0 TKS Owner's Manual page 28

Section 2 - Getting to Know Your Power Package
1. A circuit breaker provides protection for the engine wiring harness and the
instrumentation power lead. The circuit breaker can be tested by pushing the red
button. If the circuit breaker is functioning properly, the yellow lever will appear. Reset
the yellow lever after testing, or if tripped, by pushing the yellow lever back into the
housing.
2. A 90 amp fuse is located on the large post of the starter solenoid. This fuse is designed
to protect the engine wiring harness if an electrical overload occurs.
Page 20
a
Yellow lever style circuit breaker‑typical
a - Yellow lever‑shown tripped
b
22529
b - Red test button
mc74907-1
90-860168070 AUGUST 2007