Specialized Test Procedures; Dynamic Tests; Testing With Timing Light - BRP Evinrude E-Tec Series Service Manual

SYSTEM ANALYSIS

SPECIALIZED TEST PROCEDURES

SPECIALIZED TEST
PROCEDURES
DANGER
Contact with a rotating propeller is likely
to result in serious injury or death. Assure
the engine and prop area is clear of people
and objects before starting engine or
operating boat. Do not allow anyone near
a propeller, even when the engine is off.
Blades can be sharp and the propeller can
continue to turn even after the engine is
off. Remove propeller before servicing
and when running the outboard on a flush-
ing device.
DO NOT run the engine indoors or without
adequate ventilation or permit exhaust
fumes to accumulate in confined areas.
Engine exhaust contains carbon monox-
ide which, if inhaled, can cause serious
brain damage or death.
The following tests are performed with the out-
board running. Observe the operation of each
electrical circuit. Look for inconsistencies between
similar circuits and variations in cylinder perfor-
mance.

Dynamic Tests

Use the diagnostic program to perform Dynamic
Fuel and Ignition tests. These tests can be used to
momentarily stop injector or ignition function for a
selected cylinder while the outboard is running.
This is an effective tool for checking the perfor-
mance of each cylinder. Comparing one cylinder's
performance to others can frequently isolate a cyl-
inder that is not operating properly.
DO NOT misinterpret tests run at
IMPORTANT:
IDLE. The idle speed controller in the EMM com-
pensates to maintain a constant engine speed at
IDLE. The Dynamic Tests screen of the diagnostic
software includes a function to temporarily disable
the idle controller.
120
Dynamic Tests can be used in conjunction with:
A timing light to determine how other cylinders
•
are affected by one cylinder being "dropped"; or
A voltmeter to check voltage changes on electri-
•
cal circuits.
Dynamic Tests Screen
Test the outboard while the run-
IMPORTANT:
ability issue is present. Use the test procedures to
identify inconsistencies in voltages and cylinder
performance. Once a circuit has been identified as
malfunctioning, a thorough inspection of all
related wiring and connections must be per-
formed. Check all voltage inputs and grounds; and
perform resistance tests for all circuits prior to
replacing any suspect components.

Testing with Timing Light

WARNING
The electrical system presents a serious
shock hazard. DO NOT handle primary or
secondary ignition components while out-
board is running or flywheel is turning.
An inductive timing light can be used to monitor
ignition system output and the activation of fuel
injectors and the oil injection pump. DO NOT
clamp timing light pick-up on more than one wire
at a time. Avoid erratic timing light reading by iso-
lating pick-up from other wires. Self powered tim-
ing lights offer the convenience of no power
cables and can help eliminate false signals.
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