2009-2010 Suzuki DF70A DF80A DF90A Outboard Service Manual, Page 205Get this manual
Fuel System:
Individual Fuel Injector Operating Sound Inspection
Z9J0111706011
1) Disconnect the ignition coil lead wire connectors from all of the ignition coils2) Disconnect the fuel injector lead wire connector and connect the test cordSpecial tool (A): 0993089260 (Injector test cord (A))
3) Connect the Gray wire to body ground4) Momentarily touch the BlackYellow wire to the starter motor magnetic switch terminal "B" (connected to battery positive (+) terminal) and check for injector operating soundIf out of specification, replace fuel injectorCAUTION Connecting the fuel injector to battery positive for more than few seconds may cause injector overheating and possible injector solenoid failureFuel injector operating sound "click"