MerCruiser 5.7 MPI User Manual

Section 2 - Getting to Know Your Power Package
90-864197072 NOVEMBER 2007 Page 25
1. A circuit breaker protects the engine wiring harness and the instrumentation power
lead. Test the circuit breaker by pushing the red button. If the circuit breaker is
functioning properly, the yellow lever will appear. Reset after testing, or if tripped, by
pushing the yellow lever back into the housing.
b
a
22529
Yellow lever style circuit breaker‑typical
a - Yellow lever‑shown tripped b - Red test button
2. A 90 amp fuse is located on the large post of the starter solenoid. This fuse protects
the engine wiring harness if an electrical overload occurs.
mc74907-1
3. Four fuses are located on the port side of the engine. These fuses protect the main
power, fuel pump, ignition, and accessory circuits.
10715

MerCruiser 5.7 MPI Specifications

General

Engine Type	V8
Fuel System	Multi-Port Fuel Injection (MPI)
Horsepower	300 HP
Ignition	Electronic
Cylinders	8
Fuel Type	Gasoline
Alternator	65 amp
Compression Ratio	9.4:1
Fuel Requirement	87 octane (minimum)
Displacement	5.7L (350 cu in)
Max RPM	5000 RPM