This is a quick and simple way to test the spark output on your watercraft. The spark is fully contained internally; this eliminates the danger of accidentally igniting fuel vapors while troubleshooting your motor. You cannot accurately test spark by laying your plugs on the head. Weak spark goes away, under load. Engine compression is load. Contact WatCon to get your proper Spark Tester tool. It costs only $15.00 and gets you out of trouble.
