2007 Evinrude E-Tec 75, 90 HP outboards Service Manual, Page 90Get this manual
ENGINE MANAGEMENT MODULE (EMM) SENSORS AND FUNCTIONS Neutral Switch The powerhead mounted neutral switch provides ground signal for the EMM to indicate shift linkage positionThis allows the EMM to control idle speed variations for NEUTRAL or IN GEARAdditionally, tiller models use the switch for start in gear protectionFuel and ignition functions are turned off on tiller models if the neutral switch is not activatedIf the switch is not functioning properly, the EMM: Stores service code 19 (tiller models only) Initiates EMM SENSOR FAULT LED (Starting Mode only) The engine Monitor screen of the diagnostic program displays switch position, NEUTRAL or IN GEARMake sure switch is operating properly
RPM Limiter
This feature of EMM programming prevents engine damage due to excessive RPMAt 6250 RPM, fuel and ignition to the cylinders is shut offNormal engine operation resumes when engine RPM returns to the specified range
Neutral RPM Limiter
This feature of EMM programming prevents engine damage due to excessive RPM if accelerated in NEUTRALNeutral engine speed is limited to 1800 RPM