Yanmar i8350, Operation Manual

© Yanmar 2008  

Page  3

Electronic Control System:  

Operation Manual for SY Series Engines with GEN III Controls 

Start Up

WARNING

In normal operating mode, the engine is started and stopped with either the key switch, or the off-

on-stArt

 rocker switch.  

In an emergency situation, you can use the Emergency Stop switch to kill all power to the engine. This 

will allow you  to stop at once.

Place the control levers in neutral and turn the PORT ignition switch to the On position – 

but do not start the 

engine.

The green control head light will illuminate.  

Check to see if the green light on the control head is solid or flashing.  If solid, proceed to the next step. If 

flashing, push the Select button to select the head.  Position the control lever to neutral and the yellow light will 

now come on.  

Redundant (Back-up) Throttle

In the unlikely event that the throttle signal is lost between the helm mounted shift/throttle control head and the 

engine, the system is designed to revert to the redundant or back-up throttle. First, the engine would reduce rpms 

to idle speed, the digital display would show “Throttle Error,” and a small red indicator light would flash at the 

key panel (or switch panel). Near the red light is a small potentiometer (looks like a volume control knob). Turn 

the knob ALL the way to counter-clockwise in order to take control of the throttle. Then turn the knob SLOWLY 

to clockwise - the light will glow solid. You will have control of the throttle, however, you will NOT have shift 

control. When the signal loss problem has been corrected, you must shut the engine off and restart to return 

throttle control back to the shift/throttle control head.
For Emergency Shift see transmission manual.

WARNING

Completely review the start-up procedures on pages 3 through 6 before starting the engine.

Two-position Emergency Stop Switch

(must be in “off” position to run engine - 

bottom pushed in)

Three-position 

Off-On-Start Switch

Potentiometer 

"Subthrottle"

Red Indicator

Light