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- - - - - - - - - - - - E N G I N E SERVICE MANUAL
long screw in until nut is tight against
plug shell. Bring piston back up
against
long screw
and
it
will be in correct tim-
ing position.
Loosen
two
fillister head
screws
holding
stator plate and move
plate until
points
just
begin to break. See figure 10. Tighten
screws. Recheck timing
gage
setting and
position
of
points for correct timing.
J. To complete disassembly
of
magneto, pro-
ceed as
follows:
1. Remove flywheel
key
from the crank-
shaft.
2. Remove two fillister head screws hold-
ing stator plate assembly to magneto
back plate. Remove magneto and pull
high tension wire through back plate.
3. Remove cam positioning ring
from
crankshaft. This can be done easily
with a screw driver, being careful not
to damage keyway. See figure
11.
4. Remove four screws securing magneto
back plate to crankcase. On J-100 and
J-125 engines, place oil seal sleeve
(figure 5) over threaded end of crank-
shaft. Use tape to protect threads on
other engines.
This precaution will
prevent cutting oil seal when remov-
ing back plate. See figure 12.
NOTE: Exploded views of each type of
Jacobsen
eng-
i ne are shown in Section
V,
Major Overhaul.
All
parts are num-
bered in the order of disassembly. To
disassemble, remove parts in sequence
of index numbers.
Figure
10.
Timing
Magneto
Figure
11. Removing
Cam Positioning
Ring
Figure 12. Removing Magneto Baclc Plate
Reassemble magneto and engine parts.
A. To reassemble parts that have been re-
moved to the magneto back plate, refer
to the exploded views in Section
VI.
Re-
assemble in reverse order of the sequence
of index numbers.
15
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