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hgmckay
Joined: 23 May 2006
Posts: 397
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 Posted: Wed May 26, 2010 3:38 am Post subject: RotaxEngines-List Digest: 1 Msgs - 05/25/10 |
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When draining the used oil from the oil tank, what prevents air from getting
into the suction tube? All of the oil is out of the tank and the end of the
suction tube is exposed to atmospheric air.
Hugh G. McKay
Allegro 2000
Rotax 912 UL
--------------------------------------------------
From: "RotaxEngines-List Digest Server" <rotaxengines-list(at)matronics.com>
Sent: Wednesday, May 26, 2010 2:58 AM
To: "RotaxEngines-List Digest List" <rotaxengines-list-digest(at)matronics.com>
Subject: RotaxEngines-List Digest: 1 Msgs - 05/25/10
| Quote: | *
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RotaxEngines-List Digest Archive
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Total Messages Posted Tue 05/25/10: 1
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Today's Message Index:
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1. 01:57 PM - Re: "Burping" The Oil System in the 912 Engine
(bjones(at)dmv.com)
________________________________ Message 1
_____________________________________
Time: 01:57:05 PM PST US
Subject: Re: "Burping" The Oil System in the 912 Engine
From: bjones(at)dmv.com
Rotating the prop ONLY in the normal operating direction May be advised in
order to 1. fill oil tank to check oil level properly, 2. prevent pushing
air into oil delivery passages due to turning prop backwards, and 3.
prevent air from being sucked into oil passages because header tank is
empty and suction tube might draw air instead of oil. At least these are
the explanations I recall from the Lockwood maint course.
BJ
N154K
> Am I correct in my understanding that the only reason Rotax states on
> page
> 10-15 of the Operators Manual to rotate the prop several times in the
> direction of engine rotation until one hears the "burp" or "murmur" in
> the
> oil tank is to return oil to the tank to check for the proper level in
> the
> tank? Some have inferred that you must do this every time before starting
> the engine to assure proper lubrication through out the engine. My
> interpretation of the Rotax instructions on page 10-15 of their Operation
> Manual is that this is to assure that you have the correct oil level in
> the tank, and for no other reason.
>
> Hugh McKay
> Allegro 2000
> Rotax 912 UL
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kevann(at)gotsky.com
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| Posted: Wed May 26, 2010 4:18 am Post subject: RotaxEngines-List Digest: 1 Msgs - 05/25/10 |
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You would have to turn the engine over (rotate the prop) in order to move
the oil in the lines and introduce air into the plumbing.
I suppose the same could be said regarding the oil filter. Don't turn the
engine over with the filter off?
Kevin
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hgmckay
Joined: 23 May 2006
Posts: 397
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| Posted: Wed May 26, 2010 6:40 am Post subject: RotaxEngines-List Digest: 1 Msgs - 05/25/10 |
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Kevin,
Would not the oil that is in the suction tube between the inlet at the
bottom of the tank and the
high point drain out when the tank is drained leaving air in this portion of
the suction tube?
Hugh
--------------------------------------------------
From: "Kevin Klinefelter" <kevann(at)gotsky.com>
Sent: Wednesday, May 26, 2010 8:17 AM
To: <rotaxengines-list(at)matronics.com>
Subject: Re: Re: RotaxEngines-List Digest: 1 Msgs -
05/25/10
[quote]
<kevann(at)gotsky.com>
You would have to turn the engine over (rotate the prop) in order to move
the oil in the lines and introduce air into the plumbing.
I suppose the same could be said regarding the oil filter. Don't turn the
engine over with the filter off?
Kevin
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kevann(at)gotsky.com
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| Posted: Wed May 26, 2010 4:59 pm Post subject: RotaxEngines-List Digest: 1 Msgs - 05/25/10 |
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uh, I don't know...
Kevin
do not archive
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