1999 "EE" Evinrude 70HP 4-Stroke Service Manual, P/N 787023, Page 65Get this manual
I System Component
MAP Sensor MAP MAP Sensor MAP2 MAP Sensor MAP2 Idle Air Control (lAC) Disconnected ire Idl Air Control (lAC) Plugged Hose Closed Throttle Switch (CTP)
Incorrect Idle
CausesEffects
May idle slightly high800 to 850 RPM Hard to startextremely rough at idle or may die Lower than normal idle speed 600 RPM Lower than normal idle speed 600 RPM
Actions Code
Check for disconnected wires or failed sensorVerify using Diagnostic Software Check for disconnected or damaged hoseif OK replace sensor Check for pinched hose or plugged pulse limiter
Check for disconnected lAC valveUse Diagnostic Software to verify lAC duty cycle after repair
(1) Requires warm-up lever to start (2) Slow idle550-600 RPM (3) Will set code in gear (1) Will return to idle speed immediatelynot gradually decrease from 1200 RPM (2) Will idle faster than normal 800 RPM Probably no bad running characteristics but lAC duty cycle will be out of normal range Faster than normal idlelAC duty cycle will be extremely low Faster than normal idle similar to cold started engine Excessive tappet noise or uneven compression