Page 198 - Mercury Service Tool Guide (2020) - 8M0163249
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FOURSTROKE ELECTRICAL AND IGNITION TOOLS
TIMING LIGHT
91- 99379
Used to check ignition timing.
DVA/MULTIMETER
91- 99750A 1 TOOLS FOURSTROKE ELECTRICAL AND IGNITION
Tests the electrical and ignition systems. Consists of a VOA meter with built‑in
direct voltage adapter.
TRIM HARNESS INSTALLATION TOOL
91-8M0147078
Provides both battery and clean power to allow power tilt operation during outboard
rigging.
For FourStroke V6 and V8
SHIFT ACTUATOR TEST TEE HARNESS
91-8M0150597
Allows access to the engine harness through bullet connectors to use a DVOM
without damage to the engine harness.
Mercury Service Tool Guide 191

