912 ULS Oil splatter from exhaust on start-up

by Jacques Mey in 912 / 914 Technical Questions 5 years ago

Hi all,

My 912ULS vents small drops of oil (splatter) from the exhaust on start-up. Is this normal? What could the cause be and how do I trouble-shoot? Despite this, it runs great!

Any advice would be appreciated!

Re: 912 ULS Oil splatter from exhaust on start-up

by Capt. Siva, » 5 years ago

Capt. Siva,

25 266 738

After a long time if engine hot run. Usually drop of oil come from exhaust. Also keep eyes on oil pressure and oil pressure relief valve. If spring tension is low, change it.

Thank you said by: Jacques Mey

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Re: 912 ULS Oil splatter from exhaust on start-up

by Garrett Wysocki » 5 years ago

Garrett Wysocki

1 572 1.45k

Yes, mine does the same thing most of the time on start up. I think it is moisture/water combined with exhaust soot.

Thank you said by: Jacques Mey

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Re: 912 ULS Oil splatter from exhaust on start-up

by Bill Hertzel » 5 years ago

Bill Hertzel

13 1.95k 7.98k

There should not be any Oil spraying out of the exhaust.

As Garret said, it is likely, exhaust condensation and soot.

If you had oil in the exhaust, you would expect a start that looked similar to a B-29 with its accompanying cloud of smoke.

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

Thank you said by: Jacques Mey

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912 ULS Oil splatter from exhaust on start-up

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