Sunbeam ALPINE I SERIES: APLINE II SERIES, Workshop Manual

Page: 48 / 413

Page 10
Sparking Plugs-To clean and adjust
Plugs should be cleaned with an air blast cleaner and
before setting the plug gaps the electrode tips
should be filed lightly to remove all traces of
burning.
The gap setting of sparking plugs is very Important
and points should be correctly set by bending the
earthing (side) electrode. Never bend the centre
electrode as this will crack the insulator tip. A
suitable combined setting tool is illustrated in
Fig. 11.
Fig.6.
Fig. 7.
Fl1.B. Fig.9.
Fig. 10.
WSM. 124
Section B (Engine)
Fig. 11. Setting sparkint plug gap
The plug threads should be wire brushed and the
copper washers renewed if worn or badly flattened.
Grease or oil should not be used on these threads
as they can act as an insulator, and cause the H.T.
current to jump to earth on the outside of the plug.
IGNITION TIMING AND DISTRIBUTOR
The modern high compression engine is very
sensitive to ignition timing. In
the
following
paragraphs detailed instructions are given of
the
various methods
that can
be used to obtain
correct ignition timing. Incorrect ignition
timing can cause rough running, bad idling,
high
fuel
consumption
and
poor performance.
Distributors have different advance characteristics
and it is most important that the correct
distributor is used when a replacement unit is
fitted. The possibility of a wrong unit having been
fitted previously in service must not be overlooked.
Distributors may be identified by the despatch
number on the plate fitted on the side of the
distributor. Correct despatch numbers are given
in the Data Section under "Ignition System".
The distributor is mounted on a bracket on the
right-hand side of the engine and Is driven by an
extension of the oil pump spindle, the connection
being made by an offset coupling. The rotor
revolves in an anti-clockwise direction, viewed
from above.
.J