（Upgraded SP02） ANCEL SP21 Spark Plug Tester, Dual-Holes, 12V Gas Engine

（Upgraded SP02） ANCEL SP21 Spark Plug Tester, Dual-Holes, 12V Gas Engine

• 【Quickly Identify Weak Spark Plugs】 – Slow starts, rough running, weak acceleration, or other ignition issues can be caused by worn or weak spark plugs. The SP21 lets you check spark firing performance quickly, helping you identify potentially weak plugs before replacing parts unnecessarily
• 【Test & Compare 2 Spark Plugs at Once】 – Dual-hole testing lets you check two spark plugs simultaneously for quick side-by-side comparison. Compare a new and used plug or plugs from different cylinders to spot differences in spark strength and consistency without testing them one at a time
• 【Adjustable 0-6000 RPM Test Frequency】 – Turn the dial to adjust the testing frequency and observe spark behavior under different operating conditions. The adjustable range provides more informative testing than a single static spark check and can help reveal weak or inconsistent ignition
• 【Clear View with Protective Cover】 – The transparent protective cover lets you observe the spark directly during testing while providing separation from the testing area. Keep the cover closed during operation and follow the included safety instructions for controlled testing
• 【For 12V Gasoline Engines – Check Plug Size】 – Designed for compatible 12V gasoline engines, including cars, motorcycles, lawnmowers, ATVs, and small engines. Fits spark plugs with an insulator diameter under 12.2 mm and a length of 33–43 mm.please contact our support team at [email protected] for assistance before purchase