Cylinder Drop Tests
Use the Evinrude Diagnostics software Dynamic Tests to momentarily disable one cylinder while the outboard is running.
- The Dynamic Ignition test disables the ignition and fuel injection circuits to a cylinder.
- The Dynamic Fuel test momentarily disable s one fuel injector circuit.
By dropping one cylinder, RPM and running quality changes can be compared for each cylinder.
IMPORTANT: Test the out board at the RPM where the problem is occurring. Use the test procedures to identify inconsistencies in voltages and cylinder performance. Once a circuit has been identified a s malfunctioning, inspect all related wiring and connections. Check all voltage 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 multimeter to check volt age change s on electrical circuits.
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Dynamic Tests Screen problem component.
IMPORTANT: DO NOT misinterpret tests run at IDLE. The idle speed controller in the EMM compensates to maintain a constant IDLE speed. The Dynamic Tests screen includes a function to temporarily disable the idle controller.
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 allows temporary adjustments to the fuel flow characteristics of the 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.
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If the outboard run quality improves with a fuel control adjustment, eliminate ot her possibilities before replacing an injector:
If the outboard run quality improves with a fuel control adjustment, eliminate other possibilities before replacing an injector:
• Refer to Fuel System Pressure Test on p. 139.
• Refer to Running Fuel System Tests on p. 86.
IMPORTANT: DO NOT misinterpret tests run at IDLE. The idle speed controller in the EMM compensates to maintain a constant IDLE speed.
Inductive Amp Meter Test
Use a n inductive amp meter to monito r battery charging and current flow . Ident ifyingerratic amperage in a circuit c an b e used to isolate a problem component.
