1984 Ski-Doo Shop Manual, Page 287Get this manual
SECTION 04 ELECTRICAL SUB-SECTION 02 (IGNITION TIMING)
To adjust, remove rewind starter assembly and starter pulleyLoosen the armature plate screws, move the plate in the appropriate direction
Install dial indicator in magneto side spark plug holeBring magneto side piston to top dead centerBack-off (rotate counter-clockwise) piston to: 462 engine type: 2.52 mm (0.099") BTDC for 140W ignition unit1.76 mm (0.069") BTDC for 160W ignition unit534 engine type: 1.75 mm (0.069") BTDC BTDC: before top dead center
How to easily distinguish the 140W160W magneto
140W (4-4P)
Amplifier box part no Amplifier box connectors (qty) Starting pulley retaining screw (qty) Magneto poles (qty) 070000-680
160W (4-5P)
070000-0770 2