Spark Plug; Throttle Override System (T.o.r.s.) - Yamaha MM600D Service Manual

A
B
C
IGNITION SYSTEM

SPARK PLUG

1. Remove:
•
Spark plugs
2. Measure:
•
Spark plug gap
Standard spark plug:
BR9ES (NGK)
Spark plug gap:
SEJ8090

THROTTLE OVERRIDE SYSTEM (T.O.R.S.)

If the carburetor or throttle cable should malfunc-
tion during operation, T.O.R.S. will operate when
the throttle lever is released.
T.O.R.S. is designed to interrupt the ignition and
keep the engine revolutions between 2,800 and
3,000 r/min if the carburetor fails to return to idle
when the lever is released.
SEJ8100
WARNING
•
If T.O.R.S. operates, make sure that the cause
of the malfunction is corrected and that the
engine can be operated without a problem
before restarting the engine.
•
Be sure to use the standard resistance-type
spark plug and spark plug cap. Otherwise,
T.O.R.S. will not work properly.
SEJ8110
Status
Switch
Throttle
switch
Carburetor
switch
Engine
1
Carburetor switch
2
Throttle switch
3
Throttle cable
SEJ8120
4
Throttle stop screw
a
ON
b
OFF
8-5
ELEC
0.7 ~ 0.8 mm (0.028 ~ 0.031 in)
B C
A
Idling
or
Running
starting
OFF ON
ON OFF
T.O.R.S. operating
Running Running
– +
Trouble
OFF
OFF