1984 Ski-Doo Shop Manual, Page 282Get this manual
SECTION 04 ELECTRICAL SUB-SECTION 02 (IGNITION TIMING)
IGNITION 'TIMING
BREAKER POINTS IGNITION SYSTEMS
247 ENGINE TYPE
Two methods are detailed in this section; the first using the timing marks, stamped on the engine, the second using Top Dead Center gaugeRetighten retaining screws at this position
Timing marks procedure
1Disconnect spark plug wire and remove spark plug2Remove rewind starter assembly from engine then remove the starting pulley from magneto ring3Rotate crankshaft until breaker points, visible through magneto ring opening, are fully openedAdjust points gap to 0.35-0.40 mm (0 .014-0.016") using feeler gauge and screwdriver as illustratedToo early Turn armature plate clockwise Too late Turn armature plate counter-clockwise