2004-2005 Kawasaki STX-15F Jet Ski Factory Service Manual., Page 356Get this manual
ELECTRICAL SYSTEM 14-41 Ignition System
Ignition Coil Inspection
Measuring arcing distance The most accurate test for determining the condition of the gnition coil is made by measuring rcing istanceRemove the ignition coil (see Ignition Coil Removal)Connect the ignition coil [A] (with the spark plug cap left installed on the spark plug lead) to the tester [B], and measure the rcing istanceAuxiliary ires [C]
WARNING
To avoid extremely high voltage shocks, do not touch the coil or leadI the re thethe ignition coil or spark lug ap is defective3 ta nd( in e