Today's Message Index:
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1. 04:52 AM - Re: 912 UL Compression Test (Catz631@aol.com)
2. 05:17 AM - Re: 912 UL Compression Test (Thom Riddle)
3. 05:48 AM - Re: 912 UL Compression Test (Dave Austin)
4. 09:28 AM - Re: coolant problems? (Martin Pohl)
Message 1
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| Subject: | Re: 912 UL Compression Test |
Roger,
Would you concider making one of those Rotax compression testers for me. I
have one for a Cont/Lyc and it was a handy tool but of course it won't fit the
Rotax. I will pay you what you want.
Thanks,
Dick Maddux
Rotax 912 UL
Pensacola,Fl
**************Feeling the pinch at the grocery store? Make dinner for $10 or
less. (http://food.aol.com/frugal-feasts?ncid=emlcntusfood00000001)
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| Subject: | Re: 912 UL Compression Test |
Hugh,
First - If you are not right on top dead center, the prop will definitely spin.
Ditto what Roger said with one minor difference. We usually do a compression test
during first part of inspection while the Rotax engine is cold and usually
get almost the same readings as when fully warmed up, generally no more than 1-2
psi difference. This reading is not precisely valid but it will show up major
problems early in the inspection and save us time and the customer money by
not wasting time on minor issues first. For example, you don't change the oil/filter,
plugs and do a carb balance on an engine that needs a valve job. If
there is a cylinder that is much lower than the others but still within service
range, then we'll repeat the compression test after full engine warm up later
in the inspection. If they are all reading good cold, you accomplish little
by doing it again hot. We always note in the log book that the compression numbers
were taken either cold or hot, whichever is the case.
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Thom Riddle
Buffalo, NY
http://riddletr.googlepages.com/sportpilot-cfi
http://riddletr.googlepages.com/a%26pmechanix
A complex system that works is invariably found to have evolved from a simple system
that works.
- John Gaule
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=238128#238128
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| Subject: | Re: 912 UL Compression Test |
I'd suggest trying the use of Marvel Mystery Oil before you do anything
radical. It unsticks valves and rings etc.
Worth a try.
Dave Austin 601HDS - 912
Message 4
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| Subject: | Re: coolant problems? |
Roger & George
Thank you for your answers! I appreciate very much to get a "second opinion" on things that I am not completely sure about. I use typical typical screw type clamps (worm screw on one end, open end with slots on the other end). I took the term "Q200" from ACS (http://www.aircraftspruce.com/catalog/appages/qs200.php), my clamps are from a european distributor and are stainless.
Thx, Martin
--------
Martin Pohl
Zodiac XL QBK
8645 Jona, Switzerland
http://www.pohltec.ch/ZodiacXL/Main.html
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=238163#238163
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