Honda BF35A-BF45A Outboard Motors Shop Manual., Page 216Get this manual
HONDA BF35A945A
1) Getting the engine speed signal from the pulser coil gate circuit, the flame-out control circuit detects whether it is over or below the set speed
2) When the speed is over the set speed, the transistor (TR) turns ON and short circuits the thyrister (SCR) trigger signal the ground to flame outThe above procedures are performed flame out the No2 and No3 cylindersStable engine speed while under way is thereby obtained