"CRUSADER
250," "250
CLIPPER"
AND
"CRUSADER
SPORTS"
Unscrew and remove the centre screw securing the
contact breaker cam centre to the shaft and withdraw
the latter from the shaft.
Loosen the two small screws which secure the
contact breaker base plate and set the plate central in
its slots. Tighten the screws.
Place
the machine on the stand. Engage top gear
and
turn
the engine by rotating the back wheel until
the piston is l /64" before the top
of
the compression
stroke, as measured by a rod or wire inserted through
the plug hole, both valves being closed.
Switch
on the ignition and rotate the cam centre in
a clockwise direction (viewed from the off-side
of
the
machine) until the ammeter
is
showing a discharge.
Continue rotating slowly until the needle flicks to zero,
indicating that the points have opened.
Give the cam centre a sharp tap endways to secure
it
on the shaft and Iock up tightly with the centre screw.
Check timing by turning the engine with the back
wheel until the ammeter needle moves from discharge to
zero and see that the piston
is
1 / 64" before the top of
the compression stroke.
If
timing
is
slightly incorrect, adjust by loosening
the two screws which secure the contact breaker base
plate to the crankcase and
tum
the plate clockwise to
retard the timing, anti-clockwise to advance it. The
slots in the plate provide a range of adjustment equal to
approximately
-+-39°
on the engine shaft. This will prove
sufficient to cover normal adjustment due to wear of
contact points and contact breaker arm, movement of
the cam only being necessary should the timing
have slipped or after dismantling of the engine.
34
Sparking
Plugs.
The following are the plugs wlùch
we
have found to be most sui table for these models
:-
Lodge 2 H.N., K.L.G.F.80, Champion
L.10.S.
or
L7.
24
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