Chapter 72-20-00 : Crankshaft, Piston, Cylinder, Sprag Clutch

Chapter 72-20-00 : Crankshaft, Piston, Cylinder, Sprag Clutch

See product table below

These illustrations and parts listings serve only as a guide, the selection of complex parts should be done by an approved iRMT to ensure that the correct parts are ordered. All maintenance and repairs should be carried by an appropriately rated iRMT. Comet Aviation Supplies will not be held responsible for parts incorrectly supplied. Refer to www.flyrotax.com and www.rotaxirmt.com for further information.

Category: Tag:

*Please pay attention to the footnotes as designated by an alphabet in the columns below.

*Please contact us directly to order parts for a Rotax certified engine.

*PPE – Parts Per Engine ; AR – As Required

*Please note that the price of PRE-ORDER items are subject to change due to fluctuating exchange rates. A sales representative will get back to you with an updated quote.

a. red 79.50 mm, green 79.51 mm

b. red 84 mm, green 84.01 mm

c. A 79.50 – 79.512, B 79.513 – 79.524

d. A 84.00 – 84.012, B 84.012 – 84.024

e. at 912 ULS the complete piston with rings has to be exchanged up to S/N 4,425.123

f. with countersunk for O-ring 830415.

  • Introduced as per following engine S/N:
  • 912 A: 4,410.393
  • 912 F: 4,412.799
  • 912 S: starting with serial production
  • 912 UL: 4,403.679
  • 912 ULS: starting with serial production
  • 914 F: 4,420.207
  • 914 UL: 4,417.868

g. following Service Letter has to be noticed

  • SL-912-002 current issue
  • SL-914-002 current issue

h. with expanded space of sprag clutch

  • Introduced as per following engine S/N:
  • 912 A: 4,410.807
  • 912 F: 4,412.949
  • 912 S: 4,923.671
  • 912 UL: 4,409.089
  • 912 ULS: 5,650.835
  • 914 F: 4,420.805
  • 914 UL: 6,772.727

i. Balanced piston set: max. difference 3 g

j. with drain holes

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