Today's Message Index:
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1. 12:11 PM - Rotax 912ULS Oil Check (JohnF)
2. 01:32 PM - Re: Rotax 912ULS Oil Check (Alan Carter)
3. 01:41 PM - Re: Rotax 912ULS Oil Check (JohnF)
4. 01:59 PM - Re: Rotax 912ULS Oil Check (Alan Carter)
5. 02:48 PM - Re: Re: Rotax 912ULS Oil Check (FLYaDIVE)
6. 03:12 PM - Re: Rotax 912ULS Oil Check (Alan Carter)
7. 08:32 PM - Re: Rotax 912ULS Oil Check (Roger Lee)
8. 09:03 PM - Re: Re: Rotax 912ULS Oil Check (Jim.kulbeth@insightbb.com)
Message 1
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| Subject: | Rotax 912ULS Oil Check |
In checking the oil on the 912 via the gurgle method I usually find I have to turn
the prop over around 20 times. I noticed one pilot suggested doing this right
after flying...said it would be easier.
So I did that this morning....got a gurgle after perhaps three prop rotations.
That's nice, but I wonder why? Oil was right up there, so it all was pumped into
the oil tank. Hmmmmm .....
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=397343#397343
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| Subject: | Re: Rotax 912ULS Oil Check |
Hi John.
I am no expert,but i think you are suppose to gurgle before flying,
as it gets the oil round the bearings before the engine fires up.
I find its about 20+ turns but i find if i have not started the engine for quite
some time it could be 40+ turns. i just keep pulling it over and wonder if i
have missed it, but i keep going and sure enough then come the gurgle.
Alan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=397344#397344
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| Subject: | Re: Rotax 912ULS Oil Check |
Alan, I don't think it makes any difference if the oil is checked before or after
a flight...I just want to know how much oil is in the engine....it won't
change much after a short flight...the 912 doesn't use oil between changes.
My wonderment is why all the residual oil gets 'pumped' into the tank so easily
when checked right after a flight, as opposed to before. I doubt that oil gets
'sucked' out of the tank while the plane is just sitting there...all this is
just mental exercise with little real world importance...
One pilot mentioned looking at the oil level before doing anything; then gurgle
it and see the 'full' oil level. After that you could perhaps just look at the
dip stick without doing anything, relying on the oil that could be pumped back
to the tank. I don't really recommend that but it could be useful info.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=397345#397345
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| Subject: | Re: Rotax 912ULS Oil Check |
Hi John.
Im sure we will get an expert in on this sometime.
But the engine should be gurgled before engine start,
On big dry sump engines you pull the prop over to check there is no Hydraulicking
due to oil building up in the sump, the rotax is a dry sump and i guess the
same applies, also it is important to get oil around the bearings,
But we have some experts on sit who will give a better answer,
Alan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=397346#397346
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| Subject: | Re: Rotax 912ULS Oil Check |
I love the way you guys throw around the term EXPERT!
Do you know the definition of the word expert?
Well, if I may, let me enlighten you:
X is the algebraic symbol for an unknown.
SPURT is a drip under pressure.
Therefore an x-spurt is an Unknown Drip Under Pressure.
Barry
On Sat, Mar 30, 2013 at 4:59 PM, Alan Carter <alancarteresq@onetel.net>wrote:
> alancarteresq@onetel.net>
>
> Hi John.
> Im sure we will get an expert in on this sometime.
> But the engine should be gurgled before engine start,
> On big dry sump engines you pull the prop over to check there is no
> Hydraulicking due to oil building up in the sump, the rotax is a dry sump
> and i guess the same applies, also it is important to get oil around the
> bearings,
> But we have some experts on sit who will give a better answer,
> Alan
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=397346#397346
>
>
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| Subject: | Re: Rotax 912ULS Oil Check |
Can you have an" unknown" drip under pressure, ??
Alan.
But the question is gurgle before or after ?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=397352#397352
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| Subject: | Re: Rotax 912ULS Oil Check |
Hi Guys,
What determines how many revolutions the prop needs to turn before the gurgle is
how much oil is in the bottom of your crankcase. That is all the prop rotation
is doing is building some crankcase pressure that pushes the oil in the bottom
of the crankcase back to the oil tank out that bottom hose on the engine.
It can change when cold and it is usually less right after flying.This level can
change over time on your engine so the revolutions needed may change with it.
Other things that can determine some of this is whether you are using the older
verses new Rotax oil filters or some off brand. filter. The tank height in
relation to the engine. Some aircraft have it mounted high and some low. The
tank height has a spec in the Rotax manual which doesn't always get followed.
Can the oil level lie to you after a gurgle? Absolutely
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center - Heavy Maint. Rated
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=397388#397388
Message 8
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| Subject: | Re: Rotax 912ULS Oil Check |
Roger I have a question. Last year I went to Florida to pickup up a plane with
a 912UL in it. It had not flown for about 3 months. When we checked the oil the
tank was empty. After about 10 revolutions we heard what we call the burp and
turned a couple more. We checked the oil and it was good. That was my first
experience with Rotax. Fast forward until now. I have a912UL and every time I
fly I check the oil but do not burp the engine because the tank oil checks good
on the stick. When I read my hand book it says to check the oil and either rotate
the prop as discussed, or start the engine and idle for one minute. In
your opinion, am I damaging my engine if I do the latter?
Regards
Jimmy
On Mar 30, 2013, at 11:31 PM, "Roger Lee" <ssadiver1@yahoo.com> wrote:
>
> Hi Guys,
>
> What determines how many revolutions the prop needs to turn before the gurgle
is how much oil is in the bottom of your crankcase. That is all the prop rotation
is doing is building some crankcase pressure that pushes the oil in the bottom
of the crankcase back to the oil tank out that bottom hose on the engine.
It can change when cold and it is usually less right after flying.This level
can change over time on your engine so the revolutions needed may change with
it. Other things that can determine some of this is whether you are using the
older verses new Rotax oil filters or some off brand. filter. The tank height
in relation to the engine. Some aircraft have it mounted high and some low. The
tank height has a spec in the Rotax manual which doesn't always get followed.
> Can the oil level lie to you after a gurgle? Absolutely
>
> --------
> Roger Lee
> Tucson, Az.
> Light Sport Repairman - Maintenance Rated
> Rotax Repair Center - Heavy Maint. Rated
> Home 520-574-1080 TRY HOME FIRST
> Cell 520-349-7056
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=397388#397388
>
>
>
>
>
>
>
>
>
>
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