TRBLSHTG Troubleshooting9-5 67C3K11Symptom 1: Unstable engine idle speed, poor acceleration, poor performance, limitedengine speed, or engine stallsSymptom 2 Cause 1 Cause 2 Checking stepRefertopageIntermittent spark Spark plug malfunc-tion — Check the sparkplug.3-6Spark plug cap mal-function — Check the sparkplug cap.8-16Ignition coil mal-function — Check the ignitioncoil.8-16Engine shut-offswitch malfunction — Check the engineshut-off switch.8-188-19Charge coil mal-function — Check the chargecoil.8-17Pulser coil malfunc-tion — Check the pulsercoil.8-17Short or open con-nection in ignitioncircuit—Check the wiringharness continuity.WDCDI unit malfunc-tion — Check the CDI unit. 8-19Incorrect fuel andair amount suppliedPinched or kinkedfuel hose —Check the fuelhoses and fuel hosejoint.3-3Clogged fuel filter — Replace the fuel fil-ter.3-3Fuel pump malfunc-tion —Disassemble andcheck the fuelpump.4-4Carburetor malfunc-tionCarburetors notsynchronizedSynchronize thecarburetors.4-17Throttle stop screwnot adjusted cor-rectlyAdjust the throttlestop screw.3-11Pilot screw notadjusted correctlyAdjust the pilotscrew.4-15Malfunction of thecarburetor internalpartsDisassemble andcheck the carbure-tor.4-12Prime Start systemmalfunctionCheck the PrimeStart system4-13WD: See the wiring diagram.
