Rotax 912 iS Sport Operator's Manual page 81

8.2) Engine back to operation
Effectivity: 912 i Series
Edition 2 / Rev. 0
If preservation (including oil change) took place within a year of
storage, oil renewal will not be necessary. For longer storage
periods repeat preservation annually.
Step Procedure
1 Remove all plugs and caps.
2 Clean spark plugs with plastic brush and solvent.
3 Reinstall.
BRP-Rotax Page 8-3
January 01 2019