1989 Ski-Doo Repair Manual, Page 123Get this manual
Section 02 ENGINE Sub-section 05 (503 ENGINE TYPE)
7011, 1213141516, 17181g20
Engine Rotax type 603 Stud Ml0 31 (4) Distance sleeve (4) Engine bfilcket Hat washer 70.5 mm 21 (4) Lock washer 10 mm (4) Hexagonal nut MIO (4) Rubber mounr (4) Washer (4) Huxagonal elastic stop nut Ml0 1,5 (4) Gasket (4) Exhaust manifold Lock washer (4) Allen screw M8 30 (4) Connector pipe Male ball joinr Muffler female ball Joint (2) Spring (6) Muffler clamp (2) Hexagonal head cap screw M8 1.25 80 (2)
21, 22232425
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Muffler Cup (4) Bushing (2) Spring (4) Cup (4) Connector Connecror ring Rivet (3) Elbow Hose in (702 mm) Clamp (3) Spark plug grommet (2) Rubber buffer Startor grip Exhaust grommet Loctite 242 (blue, medium strength) Air duct Rivet (6) Washer (6) Push nut (2)