Sea-doo 1997 GSI, Shop Manual

Page: 320 / 372

Section 12 TECHNICAL DATA
Sub-Section 03 (GSX MODEL)
12-03-1
GSX MODEL 0
ENGINE GSX (5624)
Engine type Bombardier-Rotax 787
Induction type Rotary valve
Exhaust system Type Water cooled, water injected with regulator
Water injection fitting (head) 3.5 mm (.139 in)
Water injection fitting (cone) Not applicable
Water injection fitting
(muffler)
3.5 mm (.139 in)
Exhaust valve Rotax Adjustable Variable Exhaust (RAVE)
Starting system Electric start
Lubrication Fuel/oil mixture VROI (Variable Rate Oil Injection)
Oil injection pump Direct driven
Oil type BOMBARDIER-ROTAX injection oil
Number of cylinders 2
Bore Standard 82 mm (3.228 in)
First oversize 82.25 mm (3.238 in)
Second oversize Not applicable
Stroke 74 mm (2.99 in)
Displacement 781.6 cm³ (47.7 in³)
Corrected compression ratio 6.0: 1
Cylinder head warpage (maximum) 0.05 mm (.002 in)
Piston ring type and quantity 1 Semi-trapez – 1 Rectangular
Ring end gap New 0.25 - 0.40 mm (.010 - .016 in)
Wear limit 1.00 mm (.039 in)
Ring piston groove New 0.025 - 0.070 mm (.001 - .003 in)
Wear limit 0.2 mm (.008 in)
Piston/cylinder wall
clearance New (minimum) 0.110 mm (.0043 in)
Wear limit 0.200 mm (.008 in)
Cylinder taper (maximum) 0.100 mm (.004 in)
Cylinder out of round (maximum) 0.080 mm (.003 in)
Connecting rod big end axial
play New 0.230 - 0.617 mm (.009 - .024 in)
Wear limit 1.2 mm (.047 in)
Crankshaft deflection MAG side: 0.050 mm (.002 in); PTO side: 0.030 mm (.001 in)
Rotary valve timing Opening 146.5° ± 5 BTDC
Closing 64° ± 5 ATDC
Rotary valve duration 159°
Crankcase/rotary valve gap 0.25 - 0.35 mm (.010 - .014 in)
Connecting rod/crankshaft
pin radial clearance New 0.023 - 0.034 mm (.0009 - .0013 in)
Wear limit 0.050 mm (.002 in)
Connecting rod/piston pin
radial clearance New 0.003 - 0.012 mm (.00012 - .00047 in)
Wear limit 0.015 mm (.00059 in)
ADDITIONAL INFORMATION:
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