Stevens Instrument Company S48H 4-Wire Spark Checker for Small Engines

The Stevens Instrument Company S48H is a professional-grade four-wire spark checker designed for diagnosing ignition systems on 1 to 4 cylinder engines. This spark tester is ideal for use with CDI (Capacitor Discharge Ignition) systems commonly found in marine engines, small engines, motorcycles, and powersports equipment.

Key Features:

• Sliding mechanism adjusts four gaps marked from 1/4 inch to 1/2 inch, with measurements also provided in millimeters
• Black background for easy spark visibility, recessed to prevent carbon tracking
• Molded from Valox material, highly resistant to chemical, UV, and physical damage
• Made in the United States for superior quality and reliability
• Open-gap design allows easy visual confirmation of spark presence and strength

This versatile diagnostic tool helps technicians and mechanics quickly identify ignition problems by testing spark plug output at various gap settings. The durable construction and precision design make the S48H an essential tool for maintaining and troubleshooting small engine ignition systems.