Suzuki 30-40HP outboard motors Service Manual, Page 12Get this manual
Suzuki DT30C (After 1987) 1b test secondary windings, attach one tester lead to each spark plug wire terminal and remaining tester lead to orange wire on number coilblue wire on number coil and gray wire on number coilRenew coil(s) if resistance is not within 1900-2700 ohmsTHRO'ITLE VALVE SENSOR1b test throttle valve sensor (5 -FigSZll -48)remove alignment pin attached to cover over throttle valve sensor and insert alignment pin (lJ into hole in sensor and sensor cam (:3)Align slot in cam (3) with throttle shaftDisconnect throttle valve sensor connector (4)Connect test harness 09930-89530 or suitable jumper wires to battery shown in FigSZll48Ilattery voltage must be nine volts or moreConnect positive+) lead of suitable digital voltmeter to test harness light green wire with red tracer and voltmeter negative-lead to battery negative (-) terminal as shownWith throttle fully closed, voltmeter reading should be 0.45-0.55 voltIf not, remove rubber cap (2) and turn adjustment screw (und er cap) as necessary obtain the correct voltage readingNote that turning adjustment screw clockwise will increase vo!tlge and counterclockwise will decrease voltageNOTE: The manufacturer recommends using only nonmetallic screwdriver to turn sensor adjusting screw or sensor voltmeter reading may not be validIf metal screwdriver must be used, remove screwdriver from area of throllie valve sensor aller adJustment to prevent erroneous voltmeter reading