1971-1973 Arctic Cat Snowmobiles Factory Service Manual, Page 54Get this manual
ENGINE SERVICING (VVANIEL IM914B) Technical Data
Engine type: Cooling: Direction of rotation: Chamber Displacement: Compression ratio: Power output: SACHSWankel Engine KM 914 Air cooled with fan Counterclockwise (as seen from the power dr iveside) 18.3 cuin(300 c.c per chamber 8:1 18 HP (DIN) at 5000 rpm 20 HP (SA E) at 5000 rpm anti-friction bearings Fueloil mixture at ratio of 50:1 (for appropriate oils see page 18) BOSCH magneto ignitionlighting system (12 Volt40Watt or 12 Volt 75 Watt) BOSCH magneto ignition (without lighting generator) also in conjunction with startergenerator Ignition advance: Contact breaker gap: Pole shoe gap: 10Mainshaft bearings: Engine lubrication: Ignition system:
before top dead center
(0.016 -:- 0.002 in(0.4 -:- 0.05 rnm) 0.315 0.472 in(8 12 mm) 0.590 0.748 in(15 19 mm)
without lighting generator and with 12 Volt 75 Watt systems with 12 Volt 40 Watt systems
Spark plug: Carburetor: