Technical data

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Section 13 TECHNICAL DATA

Sub-Section 04 (HX MODEL)

13-04-1

HX MODEL 4

ENGINE HX (5881)

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 82.00 mm (3.228 in)

First oversize 82.25 mm (3.238 in)

Second oversize 82.50 mm (3.248 in)

Stroke 68 mm (2.68 in)

Displacement 718 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 New 0.060 - 0.108 mm (.0024 - .0043 in)

clearance 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 bigend axial

play

New 0.39 - 0.74 mm (.015 - .029 in)

Wear limit 1.2 mm (.047 in)

Crankshaft deflection ➀

Rotary valve timing Opening 147ø ñ 5 BTDC

Closing 65.5ø ñ 5 ATDC

Rotary valve duration 159ø

Crankcase / rotary valve gap 0.25 - 0.35 mm (.010 - .014 in)

Connecting rod / crankshaft New 0.01 - 0.02 mm (.0004 - .0008 in)

pin radial clearance Wear limit 0.050 mm (.002 in)

Connecting rod / piston New 0.003 - 0.012 mm (.00012 - .00047 in)

pin radial clearance Wear limit 0.015 mm (.00059 in)

ADDITIONAL INFORMATION : Squish gap : 1.3 - 1.7 mm (.051 - .067 in)

➀ MAG side : 0.05 mm (.002 in)

PTO side : 0.03 mm (.001 in)