Description
SIERRA Mercury/Mariner 3-Cylinder Trigger – 18-99393 is the rotating-timing pickup assembly used to signal ignition timing on selected 1987-1999 Mercury/Mariner 45 Jet and 50-90 HP 3-cylinder outboards.
Features
- Application: selected 1987-1999 Mercury/Mariner 45 Jet and 50-90 HP 3-cylinder outboards
- Trigger configuration: 3-cylinder
- Replaces Mercury references 99021A3/A5/A8/A13/A15/A16
- Provides timing-pulse input to the matching switch-box ignition system
- Legacy CDI interchange: CDI 134-9021-3
Specifications
- Application: selected 1987-1999 Mercury/Mariner 45 Jet and 50-90 HP 3-cylinder outboards
- Component: Ignition trigger
- Configuration: 3-cylinder
- OE references: 99021A3/A5/A8/A13/A15/A16
- Part number: 18-99393
Interchange
- 99021A3/A5/A8/A13/A15/A16
- CDI 134-9021-3

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