2002-2009 Suzuki LT-F250 Ozark Service Manual, Page 240Get this manual
ELECTRICAL SYSTEM
INSPECTION
IGNITION COIL PRIMARY PEAK VOLTAGE Remove the fuel tank left side cover( 7-5) Remove the left front inner fender( 7-5) Remove the spark plug cap Connect new spark plug to spark plug cap and ground it to the cylinder headNOTE: Make sure that the spark plug cap and spark plug are connected properly and the battery is fully-chargedMeasure ignition coil primary peak voltage using the multi circuit tester in the following procedure Connect the multi circuit tester with the peak voltage adaptor as follows+ Probe: BlackWhite lead wireProbe: WhiteBlue lead wire NOTE: Do not disconnect the ignition coil primary wire09900-25008: Multi circuit tester set
Peak volt adaptor
When using the multi circuit tester and peak volt adaptor, refer to the appropriate instruction manual Shift the transmission to the neutral position and turn the ignition switch to the "ON" position Press the starter button and allow the engine to crank for few seconds, and then measure the ignition coil primary peak voltage Repeat the above procedure few times and measure the highest ignition coil primary peak voltageTester knob indication: Voltage) Ignition coil primary peak voltage: More than 120 V