1985 Ski-Doo snowmobile Service Manual, Page 142Get this manual
Section 02 ENGINE Sub-section 07 (503 ENGINE TYPE)
1Cylinder flange gasket (2)
2 34567B9101112 13
Cylinder (2) Cylinder head gasket (2) Cylinder head (2) Washer B.4 mm (4) Hexagonal nut mm (4) Washer B.4 mm (4) Distance nut 37 mm (4) Intake manifold gasket (4) Intake manifold Lock washer mm (4) Hexagonal bolt MB 40 mm (2) O-ring
14 15 1617 lB19202122232425 26
Intake manifold cover Hexagonal bolt MB 64 mm (2) Lock washer mm (2) Hexagonal bolt M6 30 mm (2) Noise damper NOise damper (short) (4) NOise damper (long) (4) Piston (2) Rectangular ring (2) Semi-trapez ring (2) Needle bearing (2) Gudgeon pin (2) Circlip (4)
CLEANING
Discard all gasketsClean all metal components in non-ferrous metal cleanerScrape off carbon formation from cylinder exhaust port, cylinder head and piston dome using wooden spatula
INSPECTION
The inspection of the engine top end must include the following measurements:
TOLERANCES MEASUREMENTS FITTING NEW PARTS (MIN (MAX
N.A NA N.A NA
WEAR LIMIT