OPERATION No MA. 210-O Q : C.‘/)c,r&iug nnrt nrljtlsliug I110 c~t~~clro~~ic igrliliorl sj’slvnv. Op. MA. 210-O a 3
1. Adiust star-point gop : 0.3 to 0.5
mm
2. Check the centrifugal advance curve :
a) Note the advance in stages for steadily increasing engine speeds from 0 to 3000 rpm and for steadily decreasing
engine speeds from 3000 rpm to 0. making sure the increase or decrease is continuous. These points must fall
within the shaded area of the curve.
b ) To a certain extent. it is possible to correct the advance curve. by altering the tension of the springs for the
z
centrifugal weights To obtain this condition slightly bend (
irr
I~V
nppropriate clirvcliou
) the securing brackets
6
for the springs. or replace them.
ot,
43
a
3
E
E 3. Checking the symmetry of the star-points :
-z
0
IFi
The angular positioning of the 4- star-points must be the same to within 1”. whatever the speed of the engine.
4. Checking the vacuum advance curve :
This check is carried out at a constant 200 rpm. with
no centrifugal advance.
Check the points for the increasing
curve,
then the decreasing curve.
If the vacuum capsule has a breather, it will be necessary to blank it off during the’test.
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