SB-914-039UL explanation

by Clausen Bernard in 912 / 914 Technical Questions 6 years ago

Is somebody can explain me why some crankcase like serial number in the range off Rotax 914 UL 4 418 XXXand followings (BS -914-039UL) have to be replaced to obtain extention calender time to 15 years? More, what 's the real risk to extend the calendar without changing the crankcase?
Many thanks
Bernard Clausen

Re: SB-914-039UL explanation

by Bill Hertzel » 6 years ago

Bill Hertzel

13 1.95k 8k

It is as of a result of improvements to the crankcase over the years.
Early crankcases were subject to case cracks and head studs pulling out.
These issues have been addressed in the current crankcase.

Refer to...
https://legacy.rotaxowner.com/si_tb_info/serviceb/sb912029914018r3.pdf
https://legacy.rotaxowner.com/si_tb_info/serviceinfo/3ul99.pdf

Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

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Re: SB-914-039UL explanation

by Clausen Bernard » 6 years ago

Clausen Bernard

2 2 0

Hello,
Thank You for the message conserning this crankcase.
Good week End.
Bernard Clausen

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