I read here: https://www.recreationalflying.com/threads/jabiru-gen-4.69470/#post-507856 that some carbureted Rotax engines with 4 lobe oil pumps have problems that are fixed in the iS which always has a 6 lobed pump. How can I tell if my 912ULS has a 4 or 6 lobe pump?
Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
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