GGP Mountfield SV-150, Workshop Manual, Page: 29 / 35

17 Carry out a spark test as described in point “A”:
– If the spark jumps = the coil functions cor-
rectly, so if the system malfunctions, it is due
to the earth microswitch or relative cable
[
6.7.B] ;
– If the spark does not jump = the coil is faulty
and must be replaced [ point “C”] .
18 Remount the conveyor [ 6.1.A] .
C) Replacing the coil
21 Remove the conveyor with the tank [ 6.1.A] .
22 Disconnect the faston of the earth cable (11).
23 Dismount the metal spark plug cap (16).
24 Undo the two screws (13) and take out the coil
(12).
25 Mount the new coil without tightening the two
screws (13) and turn the flywheel (14) until the
magnetic inserts are lined up with the poles of
the coil core (12).
26 Insert a 0.35 mm thickness gauge (15) between
the flywheel (14) and the coil poles. Push the
coil until the poles come in contact with the
thickness gauge and secure both screws (13).
Tighten the screws remembering that the air
gap must be between 0.25 and 0.40 mm.
27 Remount the spark plug cover (16), screw it
firmly onto the end of the black cable (17) and
connect the earth cable faston (11).
28 Remount the conveyor [ 6.1.A] .
Tightening torques
1 Spark plug tightening torque ........... 16-18 Nm
Technical information
Type of spark plug ..... GL4RC (Torch) or equivalent
Distance between electrodes .............. 0.6-0.8 mm
Coil/flywheel air gap ........................ 0.25-0.40 mm
Special equipment
3 Tester for spark test
SV 150
6.6 .
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IGNITION SYSTEM
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