Dynamic Tests; Cylinder Drop Tests; Fuel Control Adjustment; Inductive Amp Meter Test - Evinrude E-Tec 40 HP Service Manual

SYSTEM ANALYSIS

DYNAMIC TESTS

DYNAMIC TESTS

Cylinder Drop Tests

Use the Evinrude Diagnostics sof tware Dynamic
Tests to moment arily disable one cylinder while
the outboard is running.
The Dynamic Ig nition test disables the ignition
•
and fuel injection circuits to a cylinder.
The Dynamic Fuel te st mome ntarily disable s
•
one fuel injector circuit.
By dropping one cylinder, RPM and running qual-
ity changes can be compared for each cylinder.
Test the out board at the RPM
IMPORTANT:
where the problem is occurring. Use the test pro-
cedures to identify inconsistencies in voltages and
cylinder perfo rmance. On ce a circuit has been
identified a s malfu nctioning, inspect all rela ted
wiring and connections. Check all vo ltage in puts
and grounds; and perform resistance tests for all
circuits before replacing any suspect components.
Dynamic Tests can be used with:
A timing light to determine how other cylinders
•
are affected by one cylinder being "dropped"; or
A digital mult imeter to check volt age change s
•
on electrical circuits.
Dynamic Test Screen
DO NOT misinterpret tests run at
IMPORTANT:
IDLE. The idle speed controller in the EMM com-
pensates to maintain a constant IDLE speed. The
Dynamic Tests screen includes a fun ction to te m-
porarily disable the idle controller.
76

Fuel Control Adjustment

Use this test is to help identify a cylinder that may
be too rich or too lean. This feature should not be
used by itself to identify a faulty injector.
Evinrude Diagnostics software allo ws temporary
adjustments to the fuel flo w characteristics of t he
injectors. Factory fuel flow settings are restore d
when power to the EMM is returned to OFF.
Test the outboard at the RPM where the problem
is occurring.
If th e outbo ard run q uality improves with a fue l
control adjustment, eliminate ot her possibilities
before replacing an injector:
Refer to Fuel System Pressure Test on p. 137.
•
Refer to Running Fuel System Tests on p. 85.
•
IMPORTANT:
IDLE. The idle speed controller in the EMM com-
pensates to maintain a constant IDLE speed.

Inductive Amp Meter Test

Use a n ind uctive amp me ter to monito r battery
charging and current flow . Ident ifying erratic
amperage in a circuit c an b e used to isolate a
problem component.
008570A
DO NOT misinterpret tests run at
008575A