Sierra 118-8960-1 Adjustable Spark Gap Tester Tool 8-Cylinder Marine Ignition

The Sierra 118-8960-1 Adjustable Spark Gap Tester is an enclosed ignition diagnostic tool designed for marine and powersports engines. Built to test ignition spark in up to eight cylinders, this tester works with your existing spark plug wires, making it a convenient and efficient tool for diagnosing ignition system issues without the need for additional hardware.

The enclosed housing design helps reduce the possibility of igniting gas fumes, making it a safer choice for use in the confined engine compartments of boats and other marine applications. A heavy-duty mounting wire allows the unit to be positioned at virtually any angle for hands-free testing.

Key Features:

• Enclosed, adjustable spark gap tester for up to 8-cylinder engines
• Adjustable gap settings: 1/8 in., 1/4 in., 3/8 in., and 1/2 in.
• Heavy-duty wire allows mounting in any position
• Enclosed housing helps reduce risk of igniting fuel vapors
• Compatible with snap-on female spark plug wire connectors
• Uses existing spark plug wires — no additional adapters required

This Sierra spark tester is a trusted tool for marine technicians and do-it-yourself boaters performing ignition system diagnostics. Also known by cross-reference number 18-8960-1. Interchange: CDI Electronics 511-9766. UPC: 808282398347.