2006-2010 Suzuki DF150 / DF175 4-Stroke Outboards Service Manual, Page 149Get this manual
ENGINE ELECTRICAL
STARTER MOTOR OPERATION CONDITION The starter motor relay is controlled by the ECMThe starter motor relay will only engage when the ignition switch is turned to the "START" position if the all of the following conditions are satisfied Lock plate is attached to emergency stop switch Neutral switch is in "ON" position Engine is not already operatingNOTE: If failure exists in the Sub-battery cable or the 15 ampfuse in its circuit, the starter motor relay circuit will not functionSTARTER ENGAGEMENT MECHANISM solenoid (electromagnetic force) type starter switch, utilizing torsion spring and shift lever, engages the pinion gear to the flywheelWhen the ignition key is turned to "START", current flows through the switch winding creating an electromagnet pulling the plunger inThe shift lever, attached to the plunger, then pushes the pinion up into engagement with the flywheelPlunger and shift lever movement also compresses the torsion spring, which applies pressure against the shift lever and pinion gear to maintain positive engagementFinal plunger movement closes the starter switch contacts, which allows current to flow through the starter motor windings, rotating the starter motor armature, pinion gear and flywheelWhen the ignition key is released from start, current flow to the switch is shut off and electromagnetic force ceasesThe torsion spring then pulls the plunger out, disengaging the pinion gear from the flywheel through the shift leverMovement of the plunger also opens the switch contacts, stopping current flow to the starter motor windings, shutting off the starter motor11 12 10 4