BEFORE SEARCHING FOR
AN
IGNITION FAULT, ALWAYS CHECK OVER ALL
I
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ELECTRICAL CONNECTIONS: CLEAN
AND
TIGHTEN IF NECESSARY.
I
I
i
i
1
ENGINE
WILL
NOT
START.
NO
SPARK
AT
PLUGS.
Note. To check, remove the plugs and place them on the cylinder head after
i
re-fitting the connector. Turn the ignition switch to "IGN" (clockwise) and kick
over the engine.
The plugs should fire with a blue spark.
If there is no spark,
turn switch to "EMG" (anti-clockwise) and test again.
Plug
Oily,
Fouled or Faulty. Clean thoroughly, preferably in a plug cleaning
machine, re-set the points gap to
0.020"
(0.50
mm.) and re-fit. Replace with correct
grade plug if faulty.
Distributor, Coil or Condenser Faulty
Distributor. See that the cover is properly fitted and the clips secure.
Check
the gap of the contact breaker points and clean and adjust if necessary (see page
172).
Coil. First clean the coil, particularly between the cable connections.
To check
I
the low tension circuit, connect a volt meter between the coil terminal marked
O;
"SW"
and earth. If there
is
no reading with the ignition switched on there is a
fault in the switch or the lead to the coil.
Nexc connect the volt meter between
the coil terminal marked "C.B." and earth. No reading here with the ignition
I
switched on indicates
a
fault in the coil primary winding. If these tests show that the
low tension primary circuit
is
in order, remove the coil H.T. lead from the distributor
cover. Remove the cover and rotate the engine until the contact points are closed.
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Switch on the ignition and hold the end of the coil
H.T.
lead about+"
(6
mm.) from the
cylinder block. Flick the contact points open with the finger and a spark should
pass to the cylinder block. No spark indicates a fault in the coil
H.T.
winding. Any
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fault in a coil can only be corrected by fitting a new unit.
Condenser.
To test the condenser, switch on the ignition and connect a volt
meter across the open contacts.
If there
is
no reading, remove the condenser and
re-test. If a reading on the meter
is
then obtained, the condenser
is
faulty and
should be changed.
1
ENGINE
WlLL
NOT START
WITH
SWITCH
ON
"IGN" BUT STARTS
1
ON
"EMG".
Battery discharged due to short circuit, poor condition due to age or damage, pro-
longed use for parking or low rate of charge from alternator. Have battery charged
from external source and equipment checked by an authorised Lucas Agent, or
Triumph Dealer as soon
as
possible.
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