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The ignition system used by the some suzuki models is a fully transistorized, electronic microcomputer timing advanced type. On this system, power is totally supplied from the battery with the ECM controlling all ignition timing functions. The ignition system is composed of the ignition coil, spark plug and components for system control (ECM, sensor,switch etc.) For exact ignition system information for your motor refer to your Repair Manual.

When the ignition switch is “ON”, battery voltage (12V) is applied to the circuit as shown in the illustration. At the calculated time of ignition, the transistor in the ECM turns “OFF”, breaking the ground circuit. In this way, a mutual induction high voltage occurs in the ignition coil secondary side and spark is generated.


Sensors at specific points on the engine monitor current engine conditions and send signals to the ECM. Based on these signals, the ECM determines the optimum ignition timing and releases voltage to the ignition coils.


Suzuki Models / Horsepower / Model Years

DF4 DF4 DF6 DF9.9 DF15 DF25 DF30 DF40 DF50 DF50 DF40QH DF50QH DF40T DF50T DF40Y DF50Y DF70 DF80 DF90 DF100 DF115 DF175 QH T Y 4HP 5HP 6HP 9.9HP 15HP 25HP 30HP 40HP 50HP 60HP 70HP 90HP 115HP 140HP 150HP 175HP 4 5 6 9.9 15 25 30 40 50 60 70 90 100 115 140 150 175 HP 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 99 00 01 02 03 04 05 06 07 08 09 10 11 Service Manual Repair Owner's Guide Diy Boat Engine Four Stroke 4-Stroke How To Fix.