Section 12 TECHNICAL DATA
Sub-Section 02 (GS AND GSI MODELS)
12-02-1
GS AND GSI MODELS 0
ENGINE GS (5621) GSI (5622)
Engine type Bombardier-Rotax 717
Induction type Rotary valve
Exhaust system Type Water cooled, water injected
Water injection fitting
(head)
3.5 mm (.139 in)
Water injection fitting
(cone)
3.5 mm (.139 in)
Starting system Electric start
Lubrication Fuel/oil mixture VROI (Variable Rate Oil Injection
Oil injection pump Gear 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 82.50 mm (3.248 in)
Stroke 68 mm (2.677 in)
Displacement 718.2 cm³ (43.81 in³)
Corrected compression ratio 6.2: 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
clearance
New 0.025 - 0.070 mm (.001 - .003 in)
Wear limit 0.2 mm (.008 in)
Piston/cylinder wall
clearance
New (minimum) 0.100 mm (.0039 in)
Wear limit 0.2 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 0.311 - 0.678 mm (.012 - .027 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 147° ± 5 BTDC
Closing 65.5° ± 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 0.020 - 0.033 mm (.0008 - .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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