Timing - BOMBARDIER 1980 Shop Manual

(
SECTION 03
SUB-SECTION 03, (IGNITION TIMING)
IGNITION TIMING - ONE CYLINDER
(247-277 TYPES)
Two methods are detailed
In
this section; the first using
the timing marks stamped on the engine, the second
using a Top Dead Center gauge.
TIMING MARK PROCEDURE
1. Disconnect spark plug wire and remove spark plug,
2. Remove rewind starter assembly from engine then
remove the starting pulley from magneto ring.
3, Rotate crankshaft until breaker points, visible through
magneto ring opening, are fully opened, Adjust points
gap to 0,35 mm
±
0.05 (,0 14"
±
,002) using a
feeler gauge and screwdriver as illustrated,
(ci))
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 light (flashlight type), or a tone timer
to the blue wire leading from engine. Connect other
to ground (metallic portion of the engine).
5, Turn timing instrument ON and rotate crankshaft until
timing marks align. Slacken the three (3) armature
plate retaining screws then rotate armature plate until
timing light fluctuates or tone signal sound level varies,
Retighten retaining screws at this position.
Too early
Turn armature
plate clockwise
~
~0
Too late,
Turn armature
plate counter-clockwise
~
277 Engme type marks
O
NOTE: Ignition timing can change upon tightening.
Always recheck after tightening,
TDC GAUGE PROCEDURE
1. Disconnect spark plug wire and remove spark plug,
2. Remove rewind starter assembly from engine then
remove the starting pulley from magneto ring.
3, Rotate crankshaft until breaker points, visible through
magneto ring opening, are fully open, Adjust POints
gap to 0.35 mm
±
0,05 (.014"
±
,002) using a
feeler gauge and screwdriver as illustrated,
(IGNITION TIMING), PAGE 1