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ENGINE CONTROL TROUBLESHOOTING

Since these procedures differ for every year and model Suzuki Outboard see Repair Manual for exact troubleshooting Repair Manual procedures.

ENGINE CRANKED, BUT NOT START (OR STOPS SHORTLY AFTER STARTING)

UNSTABLE IDLING / TROLLING (OR ENGINE TENDS TO STALL)

Possible cause :
• Incorrect by-pass air screw adjustment
• IAC valve failure
• IAC passage failure (clogged hose / silencer, etc.)
• Spark plug failure
• Ignition coil failure
• ECM failure
• Wire continuity / connection failure
• Failure of high pressure fuel system components :
• Fuel injector (clog, stuck valve, etc.)
• Fuel pressure regulator (incorrect regulated pressure, etc.)
• Fuel pump (clogged suction filter, leakage in tank, etc.)
• Fuel filter (clog, etc.)
• Hose (clog, kink, leakage, etc.)


 

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.