Stevens Instrument Company S48 8-Wire Spark Checker

The Stevens Instrument Company S48 is a professional-grade, open-gap spark checker designed for diagnosing ignition systems on engines with 1 to 8 cylinders. This versatile diagnostic tool allows technicians to visually inspect spark quality and strength, making it invaluable for troubleshooting misfires and weak ignition components.

Key Features:

• Eight-wire capacity for testing 6 and 8 cylinder engines
• Separates into two identical 4-wire halves by loosening wing nuts for use on smaller engines
• Adjustable gap mechanism with markings in both inches (1/4" to 1/2") and millimeters
• Recessed black background for easy spark visibility and prevents carbon tracking
• Molded Valox housing provides superior resistance to chemicals, UV radiation, and physical damage
• Includes two ground wires for separate 4-wire operation
• Sliding mechanism allows precise gap adjustment to simulate different load conditions

This professional spark checker is constructed from durable Valox material that withstands harsh shop environments. The adjustable gap feature allows mechanics to test spark strength under varying conditions, helping to quickly identify weak coils or ignition components. Whether you're working on single-cylinder small engines or V8 automotive applications, the S48's modular design adapts to your diagnostic needs.