diff --git a/libraries/AP_Motors/AP_MotorsMulticopter.cpp b/libraries/AP_Motors/AP_MotorsMulticopter.cpp
index dec293c376..0b2182127c 100644
--- a/libraries/AP_Motors/AP_MotorsMulticopter.cpp
+++ b/libraries/AP_Motors/AP_MotorsMulticopter.cpp
@@ -137,9 +137,6 @@ void AP_MotorsMulticopter::output()
     // update throttle filter
     update_throttle_filter();
 
-    // update max throttle
-    update_max_throttle();
-
     // update battery resistance
     update_battery_resistance();
 
@@ -176,35 +173,6 @@ void AP_MotorsMulticopter::update_throttle_filter()
     _throttle_control_input = constrain_float(_throttle_filter.get(),0.0f,1000.0f);
 }
 
-// update_max_throttle - updates the limits on _max_throttle if necessary taking into account slow_start_throttle flag
-void AP_MotorsMulticopter::update_max_throttle()
-{
-    // ramp up minimum spin speed if necessary
-    if (_multicopter_flags.slow_start_low_end) {
-        _spin_when_armed_ramped += AP_MOTOR_SLOW_START_LOW_END_INCREMENT;
-        if (_spin_when_armed_ramped >= _spin_when_armed) {
-            _spin_when_armed_ramped = _spin_when_armed;
-            _multicopter_flags.slow_start_low_end = false;
-        }
-    }
-
-    // implement slow start
-    if (_multicopter_flags.slow_start) {
-        // increase slow start throttle
-        _max_throttle += AP_MOTOR_SLOW_START_INCREMENT;
-
-        // turn off slow start if we've reached max throttle
-        if (_max_throttle >= _throttle_control_input) {
-            _max_throttle = AP_MOTORS_DEFAULT_MAX_THROTTLE;
-            _multicopter_flags.slow_start = false;
-        }
-        return;
-    }
-
-    // current limit throttle
-    current_limit_max_throttle();
-}
-
 // current_limit_max_throttle - limits maximum throttle based on current
 void AP_MotorsMulticopter::current_limit_max_throttle()
 {
diff --git a/libraries/AP_Motors/AP_MotorsMulticopter.h b/libraries/AP_Motors/AP_MotorsMulticopter.h
index fe964d7a0f..d3d1be749f 100644
--- a/libraries/AP_Motors/AP_MotorsMulticopter.h
+++ b/libraries/AP_Motors/AP_MotorsMulticopter.h
@@ -101,9 +101,6 @@ protected:
     // update the throttle input filter
     virtual void        update_throttle_filter();
 
-    // update_max_throttle - updates the limits on _max_throttle for slow_start and current limiting flag
-    void                update_max_throttle();
-
     // current_limit_max_throttle - current limit maximum throttle (called from update_max_throttle)
     void                current_limit_max_throttle();