Ignition Timing - BOMBARDIER 1982 Shop Manual

c
247 ENGINE TYPE
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 marks 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 .35-0.40 mm (0.014-0.016") using a feeler
gauge and a screwdriver as illustrated .
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) to the blue
wire leading from engine . Connect other to ground
(metallic portion of the engine).
5. Turn timing in strument ON and rotate crankshaft un-
til timing marks align . Slacken the three (3) armature
plate retaining screws then rotate armature plate until
timing light fluctuates .
SECTION 04 ELECTRICAL
SUB-SECTION 02 (IGNITION TIMING)
IGNITION TIMING
BREAKER POINTS IGNITION SYSTEMS
Retighten retaining screws at this position.
Too early
Turn armature
plate clockwise
Too late
Turn armature
plate counter-clockwise
O
NOTE: Ignition timing can change upon tightening.
Always recheck after tightening .
Top dead center 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 0.35-0.40 mm (0 .014-0.016") using a feeler
gauge and a screwdriver as illustrated.
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) to
the blue wire coming from engine. Connect other to
ground (metallic portion of the engine) .
PAG E 303