CDI Electronics 553-9702 Sensor Gap Gauge Tool

The CDI Electronics 553-9702 Sensor Gap Gauge is a precision diagnostic tool designed for setting the timerbase air gap on Johnson and Evinrude outboard engines equipped with terminal block power packs. This specialized gauge ensures proper ignition timing and optimal engine performance by allowing technicians to accurately measure and adjust the critical air gap between the timer base sensor and trigger wheel.

Key Features:

• Designed for Johnson/Evinrude engines from 1972-1978 with open timer bases
• Compatible with 2, 3, and 4 cylinder engines with terminal block power packs
• Precision gauge for accurate timerbase air gap measurement
• Essential tool for ignition system service and troubleshooting
• Durable construction for professional marine technician use

This tool is critical for maintaining proper ignition timing on vintage Johnson and Evinrude outboards. Incorrect air gap settings can result in poor idle quality, reduced performance, and difficult starting. The 553-9702 gauge takes the guesswork out of this critical adjustment, ensuring your engine runs at peak efficiency.