Installation manual

90-898305

6-12

Crank Position Sensor

Senses teeth located on flywheel under ring gear. Supplies the ECM with

crank position information and engine speed. If sensor should fail, the engine

will stop running.

Throttle Position Sensor (TPS)

Two (2) Throttle Position Sensors are used in conjunction with one another. If

one sensor should fail, the dash mounted CHECK ENGINE light will light and

the warning horn will sound. RPM will be limited to 3000 rpm. If both TPS’s

should fail, rpm will be reduced to idle by the ECM. TPS settings are not

adjustable. TPS settings can be monitored with the Digital Diagnostic Terminal

through the ECM.

NOTE: 2000 & Newer model year engines use only one TPS.

Charging System Alternator

Battery charging system is contained within the belt driven alternator,

including the regulator. At cranking speeds, electrical power for the engine is

provided by the boat battery – minimum recommended size is 750, or 1,000

MCA, cold cranking amperes. Above 550 RPM, all electrical power is provided

by the alternator. Should engine rpm drop below 550 RPM, the alternator is

not capable of providing sufficient output and the battery becomes the primary

source of electrical power. Once the engine is running and rpm is 650 or

higher, the engine will continue to run should the battery become shorted or

disconnected.

Alternator output (when hot) to the battery @ 2000 RPM is approximately 52 -

60 amperes.

FUSIBLE LINK - 2003 MY AND UP

• A 100 amp fuse (Fusible link) is installed in the alternator power outlet

wire, that runs from the alternator to the starter solenoid.

• Fuse will prevent damage to alternator and output wire, if battery

connections are reversed by mistake.

• The fuse is part of the wire so the complete wire must be replaced if the

fuse has an open circuit.

a) 100 Amp Fuse

Notes

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