Suzuki 90-200HP outboard motors Service Manual, Page 19Get this manual
Suzuki DT115DT140 (Prior to 1986) th rotlle 'alves must be full closed for idle speed switch to function NOTE: defective or maladjusted throttle valve sensor may cause Idle speed switch to be Inoperative or Ignition timing at idle speed to be incorrectPrior to testing Idle speed switch, make sure throttle valve sensor Is operating properly and correctly adjustedRefer to THROTTLE VALVE SENSOR section
OUTBOARD MOTOR
fer 10 ch art in FigSZ17-12 to test CD! moduleOn models ft er l!J86, test CD! module using St evens ;Iode CD-77 peak read ing voltmeter (PRV)To test module, remove spa rk plugs and ma ke sure battery is full charged and in good conditionDisconnect ignition coil rimary le ads fro ignit.ion coilsSet I'IIV control knobs to POSITIVE (+nd :'i00Conn ectPRV black test lead to engine grou nd and red test lead to number ignition coil prim ary wire (orange), crank en gine and note mete rRepea test at primary wires for each ignit ion coilCD! modu le outpu should be 100 volts or more on 1986 and 1987 models and 160 volt.s or more on mooe ls after l!J87Renew CD! mod ule if output is not as specifi ed