Honda BF35A-BF45A Outboard Motors Shop Manual., Page 217Get this manual
-3Overheatfoil pressure alert system The BF35A 45A is equipped with the overheatloil pressure alert system which protects the engine by controlling the engine speed in the CDI circuit when the engine is overheated or oil pressure drops
When trouble occurs, the system slows down the engine speed gradually, as sharp drop of the engine speed is very dangerous for the operator as if the boat is braked suddenlyWhen the trouble is solved, it also increases the engine speed slowly and graduallyThe system is provided with the indicator lamps and buzzuer sound (remote control type) indicate the cause of trouble the operator1) Engine speed control
11 6.5 sec4-b
Buzzer sounds
b Alert sensor OFF
Under way speed
11 12.5 sec-
sensor ON