Benelli 2014 BN600, Service Manual

Page: 54 / 243

CHK
ADJ
- 53 -
ENGINE/SPARK PLUGS
CHECKING THE SPARK PLUGS
The following section contains a table with the typical conditions
of spark plugs with the different causes of damage and any
remedies.
SPARK PLUG INSTALLATION
The following procedure applies to all spark plugs. Fig. D/
WARNING:
Lubricate the plug threads with copper grease.
NOTE:
Before installing the spark plug, clean it and also the surfaces in
contact with the gasket.
Install:
• the spark plug on the head, tightening it by hand until you
can feel it come into contact with the base of the head.
Tighten to the correct torque.
T.R.
Torque 12 N*m
Install:
• The coil (29*)
• The rubber tips (2*) and the OR gasket (3*) Fig.D
Connect:
• the coil connector
Install:
• The coil (6*)
• The bracket (8*)
Tighten to the correct torque.
T.R.
Torque 8 N*m
3
8
7
6
4
5
2
29
30
D
SOILED
SPARK PLUG
OVERHEATED
SPARK PLUG
Cause
Solutions Cause Solutions
Over rich mix of air/fuel
Carburettor incorrectly calibrated
Electrical system fault
-Imperfect coil connection
Specifi c riding conditions
-Prolonged periods at “minimum”
-Long sections at low speed
Spark plug too cold
The fuel/carburettor system
needs to be fi ne tuned
Check the coil connections
and relevant impedance
Èvery so often, the bike
needs to be taken to speeds
of about 80 km/h
Use a warmer spark plug, as
per specifi cations
Ignition too advanced
Insuffi cient air/fuel mix
Insuffi cient coolant and/or
lubricant
Spark plug torque too low
The spark plug used is too
hot
Adjust advanced ignition
Adjust air/fuel ratio
Add coolant and/or lubricant
Tighten to the correct torque
Use cooler spark plugs as per
specifi cations