BOMBARDIER 1980 Shop Manual page 150

SECTION 03
SUB-SECTION 03, (IGNITION TIMING)
o
NOTE: Breaker points gap can change upon tIght-
ening. Always recheck after tightening.
/.
~
4. Disconnect junction block at engine then connect one
lead of a timing Instrument (flashlight type) or tone
timer, to the blue wire coming from engine. Connect
other wire to ground (metallic portion of the engine).
5. Install and adjust T.D.C. gauge on engine as follows:
e Rotate magneto clockwise until piston is just before
top dead center.
• With gauge in adaptor, adjust roller so that It is parallel
with dial face. Tighten roller lock nut.
Outer nng
r=T'f ..
Adaptor
Roller
lock nut
lock nut
.. Loosen adaptor lock nut then holding gauge with dial
face toward magneto, screw adaptor in spark plug
hole,
" Slide gauge far enough Into adaptor to obtain a reading
then finger tighten adaptor lock nut.
.. Rotate magneto until piston is at Top Dead Center.
(IGNITION TIMING), PAGE 2
• Unlock outer ring of dial and turn It until "0" on dial
aligns with pointer.
e Lock outer ring in position.
6. Slacken the three (3) armature plate ret a ining screws
and turn timing instrument ON.
7. Rotate magneto counter~clockwise until piston is at
ENGINE TYPE
B,T,D,C,
247
(direct)
277 (indirect)
3.98
mm
±
0.25
(.157"
±
,010)
2,60
mm
±
0,25
(.102"
±
,010)
B,T.D.C.: before top dead center,
Slowly rotate armature plate until timing light fluctuates
or until tone signal sound level varies. Retighten retaining
screws.
O NOTE: For
247
engine type, hold advance mecha-
nism centrifugal lever in full advance position
(toward magneto rim).
0~~
Retarted
~ position
~~~
/0
~
"------
'----
Full
advance
posllion
O
NOTE: Ignition timing can change upon tightening .
Always recheck after tightening.