The Genuine Husqvarna 502519101 Airgap Gauge is a precision service tool required for the correct installation of ignition modules. This .5mm gauge ensures the critical distance between the ignition coil and the flywheel magnets is set to factory specifications.
Setting the air gap is vital for engine performance. A gap that is too wide results in a weak spark and difficult starting, while a gap that is too narrow can cause the coil to strike the flywheel, leading to catastrophic engine failure. This OEM Husqvarna tool removes the guesswork from your tune-ups.