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           ----------------------------------------------------------
                           JabiruEngine-List Digest Archive
                                      ---
                     Total Messages Posted Mon 04/23/18: 3
           ----------------------------------------------------------
 
 
Today's Message Index:
----------------------
 
     1. 07:27 AM - compression  (Bobby Paulk)
     2. 03:58 PM - Re: compression  (Tex Mantell)
     3. 07:31 PM - Re: compression  (Tim Yoder)
 
 
________________________________  Message 1  _____________________________________


Time: 07:27:36 AM PST US
From: Bobby Paulk <bobbypaulk@comcast.net>
Subject: JabiruEngine-List: compression

While doing my "Condition" inspection I found that #3 cylinder had dropped to 56
/ 80 on the differential compression gauge ( engine warm ). The other five were
72, 74, and 76 average. The leak is through the rings because I can hear it
in the Crankcase breather line to the catch can. The next day ( engine cold
) I put a pressure gauge on the cylinders and spun the engine with the starter.
All cylinders were up to 90 psi or above including the #3.

 The engine is not using oil excessively ( about one to two ounces per hour ) and
the oil is clean - about the color of maple syrup after 25 hrs on it. I sprayed
all the cylinders with Sea Foam Deep Creep and am letting it sit until I
get back there to run it and check differential compression again.

Has anyone dealt with this problem or know how to fix. I plan on flying it for
a for an hour or two and try the differential compression test again.

Thanks for any input.

Bobby

Jabiru 3300 295 hrs.

Zodiac 601 B

________________________________  Message 2  _____________________________________


Time: 03:58:09 PM PST US
From: Tex Mantell <wb2ssj@rochester.rr.com>
Subject: RE: JabiruEngine-List: compression

Whats sea foam?

Sent from Mail for Windows 10

From: Bobby Paulk
Sent: Monday, April 23, 2018 10:26 AM
Subject: JabiruEngine-List: compression

While doing my "Condition" inspection I found that #3 cylinder had dropped 
to 56 / 80 on the differential compression gauge ( engine warm ). The other
 five were 72, 74, and 76 average. The leak is through the rings because I 
can hear it in the Crankcase breather line to the catch can. The next day (
 engine cold ) I put a pressure gauge on the cylinders and spun the engine 
with the starter. All cylinders were up to 90 psi or above including the #3
..
=C2-The engine is not using oil excessively ( about one to two ounces per
 hour ) and the oil is clean - about the color of maple syrup after 25 hrs 
on it. I sprayed all the cylinders with Sea Foam Deep Creep and am letting 
it sit until I get back there to run it and check differential compression 
again.
Has anyone dealt with this problem or know how to fix. I plan on flying it 
for a for an hour or two and try the differential compression test again.
Thanks for any input.
Bobby 
Jabiru 3300 295 hrs. 
Zodiac 601 B


________________________________  Message 3  _____________________________________


Time: 07:31:26 PM PST US
From: "Tim Yoder" <ftyoder@yoderbuilt.com>
Subject: RE: JabiruEngine-List: compression

Sounds like you are doing the correct things prior to the next check. 

On your next flight I would recommend high power setting to help clean 
potential dirty rings.


Tim


From: owner-jabiruengine-list-server@matronics.com 
<owner-jabiruengine-list-server@matronics.com> On Behalf Of Bobby Paulk
Sent: Monday, April 23, 2018 7:26 AM
Subject: JabiruEngine-List: compression


While doing my "Condition" inspection I found that #3 cylinder had 
dropped to 56 / 80 on the differential compression gauge ( engine warm 
). The other five were 72, 74, and 76 average. The leak is through the 
rings because I can hear it in the Crankcase breather line to the catch 
can. The next day ( engine cold ) I put a pressure gauge on the 
cylinders and spun the engine with the starter. All cylinders were up to 
90 psi or above including the #3.

 The engine is not using oil excessively ( about one to two ounces per 
hour ) and the oil is clean - about the color of maple syrup after 25 
hrs on it. I sprayed all the cylinders with Sea Foam Deep Creep and am 
letting it sit until I get back there to run it and check differential 
compression again.

Has anyone dealt with this problem or know how to fix. I plan on flying 
it for a for an hour or two and try the differential compression test 
again.

Thanks for any input.

Bobby 

Jabiru 3300 295 hrs. 

Zodiac 601 B


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