912ULS oil and hose change

by Terry Walsh in General Tech Discussion 5 years ago

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Re: 912ULS oil and hose change

by Bill Hertzel » 5 years ago

Bill Hertzel

13 1.95k 7.96k

My point is that the maintenance Manual calls for the Oil to be changed every 50 hours if using Leaded Fuel (100LL) for more than 30% of the operation (≈50gal???) and that it is common practice when using AvGAs to change the Oil every 25 hours.
So it will be difficult to find anyone with 100 hours of 100LL use and if you did, they would not be following the Maintenance schedule that specifies it to be changed every 50 hours.

See Line Maintenance Manual Section 05-20-00, Page 16, Task 15.

If your plan is to use a 1/3 100LL mix, then you are solidly on the 50-hour schedule with a general consensus to change it ever 25 hours.

The Rotax engine does not like leaded fuel.
Unfortunately, it is often the only fuel available at many airports.
Frequent Oil Changes can help mitigate the damages.
Oil changes are cheap insurance against future problems.
Nothing good will come from stretching the schedule.

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

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Re: 912ULS oil and hose change

by Ken Ryan » 5 years ago

Ken Ryan

28 360 928

Are you therefore saying that the tank is removed, disassembled and cleaned at every oil change?

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Re: 912ULS oil and hose change

by Bill Hertzel » 5 years ago

Bill Hertzel

13 1.95k 7.96k

As a Minimum, Draining the Oil from the Bottom of the tank and refilling is an acceptable way of changing the Oil.
If you are using 100LL it would be Recommended to remove the tank for a thorough cleaning at each Oil change.

It has been my experience in many things in life that some people prefer to do as little as is necessary and others like do as much as possible.
I recommend that you change the Oil as often and in a manner that will make you feel confident when flying friends over the wilderness of Alaska.

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

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Re: 912ULS oil and hose change

by Ken Ryan » 5 years ago

Ken Ryan

28 360 928

I'll be sure to do that Bill. Roger, please post pics if you can. I would definitely appreciate it.

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Re: 912ULS oil and hose change

by Roger james Larson » 5 years ago

Roger james Larson

9 21 0

Ok..I will do that. Just so you know..I changed the Oil at 25 hours....then the next 25 hours (total 50 hours) and now will do it at 100 hours...so 50 hours on this oil change. So it will be 100 hours total engine time but of course that will be the lead left over, after i drain the oil this time. I have changed my oil filter each time. What we will see is the accumulated lead left over from 100 hours total use with the oil change intervals i mentioned. The oil for the two 25 hours changes seemed to be pretty clean each time.

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912ULS oil and hose change

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