Today's Message Index:
----------------------
1. 05:15 AM - Re: Wastegate Adjust (h&jeuropa)
2. 06:49 AM - 582 compression (droadrunner@juno.com)
3. 07:28 AM - Re: 582 compression (Noel Loveys)
4. 08:30 AM - Re: 582 compression ()
5. 09:56 AM - Re: 582 compression (Robert C Harrison)
Message 1
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| Subject: | Re: Wastegate Adjust |
A update. I found the wastegate wasn't fully closed when the servo drove it to
closed. Adjusted the cable per 12-00-00 and now everything is working correctly.
Thanks to all.
Jim Butcher
Europa N241BW
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=195715#195715
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What is a satisfactory compression on a 582?
Should it be checked with the engine warm?
Should it be checked by pulling the prop through or using the starter to
actually spin the prop?
Is the compression test a good indicator of the need for an overhaul?
Thanks,
Marlin
____________________________________________________________
Get educated. Click here for Adult Education programs.
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Message 3
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For the reasons you mentioned, irregularities in speed of turning over the
prop (crank) and weird things that happen to the seal the rings make to the
cylinder read differently with heat. I recommend using a differential
pressure meter. Feed it with 80 psi of air and read the differential
pressure with the piston being read at TDC. Readings of 70 or better are
considered execlent.
Used on four stroke engines the Differential meter will also detect and help
diagnose bad valves as well as bad rings or cylinders. Two strokes
obviously don't have the valve trains so the only thing left is the ring
seals.
Noel
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of
droadrunner@juno.com
Sent: Wednesday, July 30, 2008 11:16 AM
Subject: RotaxEngines-List: 582 compression
What is a satisfactory compression on a 582?
Should it be checked with the engine warm?
Should it be checked by pulling the prop through or using the starter to
actually spin the prop?
Is the compression test a good indicator of the need for an overhaul?
Thanks,
Marlin
____________________________________________________________
Get educated. Click here for Adult Education programs.
http://thirdpartyoffers.juno.com/TGL2141/fc/Ioyw6i3nNbXz9e4A4vPEoa10zo9AIBgK
PFmfu8YIa3bjypkYyLJvRD/
Message 4
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Hi Noel
"I recommend using a differential
> pressure meter. Feed it with 80 psi of air and read the differential
> pressure with the piston being read at TDC. Readings of 70 or better are
> considered execlent."
Just a quick note on differential meters, I know on the 914 Rotax
specifies how large the supply orifice needs to be on the differential
meter.
Lets go extremes for a minute, take a differential meter designed for a
diesel with a 3 foot diameter piston and take a compression test on a
Model Cox .010cu" with the piston not even in place, you will probably
show pretty good compression.
If you use a differential meter for a Lyc or a Cont with too large of a
supply orifice on a 914 the reading can show 80 over 80 even with a
problem.
On the other hand if you use too small of a supply orifice for Lyc or
Cont, can show low even without a problem.
Ron Parigoris
Message 5
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Noel/all
If you use a differential compression meter then please ensure someone
holds the propeller tight on Top dead centre before you feed the
compressed air to the cylinder ....otherwise you could get a severe
crack on the head.
Better be safe. If you are using this kit on a four stroke engine then
get a medical stethoscope, fit a length of small diameter pipe to it to
listen up the carb, up the exhaust pipe and lastly down the oil filler
on a wet sump engine (this will identify where the gas is escaping and
so highlight the likely fault. On the Rotax with the dry sump there's no
where to listen for the rings passing gas, but if it's not loosing gas
from carb or exhaust then piston rings are all that's left to leak !
Regards
Bob Harrison
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Noel
Loveys
Sent: 30 July 2008 15:26
Subject: RE: RotaxEngines-List: 582 compression
<noelloveys@yahoo.ca>
For the reasons you mentioned, irregularities in speed of turning over
the
prop (crank) and weird things that happen to the seal the rings make to
the
cylinder read differently with heat. I recommend using a differential
pressure meter. Feed it with 80 psi of air and read the differential
pressure with the piston being read at TDC. Readings of 70 or better
are
considered execlent.
Used on four stroke engines the Differential meter will also detect and
help
diagnose bad valves as well as bad rings or cylinders. Two strokes
obviously don't have the valve trains so the only thing left is the ring
seals.
Noel
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of
droadrunner@juno.com
Sent: Wednesday, July 30, 2008 11:16 AM
Subject: RotaxEngines-List: 582 compression
What is a satisfactory compression on a 582?
Should it be checked with the engine warm?
Should it be checked by pulling the prop through or using the starter to
actually spin the prop?
Is the compression test a good indicator of the need for an overhaul?
Thanks,
Marlin
____________________________________________________________
Get educated. Click here for Adult Education programs.
http://thirdpartyoffers.juno.com/TGL2141/fc/Ioyw6i3nNbXz9e4A4vPEoa10zo9A
IBgK
PFmfu8YIa3bjypkYyLJvRD/
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