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                           M14PEngines-List Digest Archive
                                      ---
                     Total Messages Posted Fri 06/19/20: 2
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Today's Message Index:
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     1. 01:56 PM - COMPRESSION CHECK M14PF-XDK.  (Snazpappy)
     2. 09:43 PM - Re: COMPRESSION CHECK M14PF-XDK.  (Anthony Spence)
 
 
 
________________________________  Message 1  _____________________________________


Time: 01:56:22 PM PST US
Subject: M14PEngines-List: COMPRESSION CHECK M14PF-XDK.
From: "Snazpappy" <snazman1@hotmail.com>


OK guys and gals please give me your thoughts.  I did my first compression check
on my Yak since I bought it a little over a year ago. I did a cold compression
check on the engine and it has not flown or been run up since about September
last year.

I did the check twice to see the results first check was
#1  52/80
#2  16/80 blowing out breather
#3  78/80
#4  45/80 blowing out breather
#5  62/80
#6  55/80
#7  63/80
#8  75/80
#9  64/80

Second check
#1   55/80
#2  15/80
#3  79/80
#4  39/80
#5  66/80
#6  51/80
#7  70/80
#8  72/80
#9  74/80

I borescoped #2 and maybe a little scoring on the wall but it really is hard to
see anything as I am not real good or have any experience with the borescope.
I also borescoped #3 for comparison and it looked the same to me.   I am thinking
of putting it all together and fly it a little and redo the test with a warm
engine.  

Please give me your thoughts and suggestions.

Todd


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=496950#496950


________________________________  Message 2  _____________________________________


Time: 09:43:59 PM PST US
From: Anthony Spence <antspence62@gmail.com>
Subject: Re: M14PEngines-List: COMPRESSION CHECK M14PF-XDK.

Todd

Yes, most definitely must be warm, if you are not happy to fly it then at
least give it a very good ground run, get it nice and hot. As an A+P and a
Yak owner, I can tell you a cold engine will never give you a good reading,
and do the blowbys as soon as you can after shut down, but be careful to
take all the plug leads off, and be very careful of the hot engine because
it can still fire.

Good luck

Anthony.

On Fri, Jun 19, 2020, 16:01 Snazpappy <snazman1@hotmail.com> wrote:

>
> OK guys and gals please give me your thoughts.  I did my first compression
> check on my Yak since I bought it a little over a year ago. I did a cold
> compression check on the engine and it has not flown or been run up since
> about September last year.
>
> I did the check twice to see the results first check was
> #1  52/80
> #2  16/80 blowing out breather
> #3  78/80
> #4  45/80 blowing out breather
> #5  62/80
> #6  55/80
> #7  63/80
> #8  75/80
> #9  64/80
>
> Second check
> #1   55/80
> #2  15/80
> #3  79/80
> #4  39/80
> #5  66/80
> #6  51/80
> #7  70/80
> #8  72/80
> #9  74/80
>
> I borescoped #2 and maybe a little scoring on the wall but it really is
> hard to see anything as I am not real good or have any experience with the
> borescope. I also borescoped #3 for comparison and it looked the same to
> me.   I am thinking of putting it all together and fly it a little and redo
> the test with a warm engine.
>
> Please give me your thoughts and suggestions.
>
> Todd
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=496950#496950
>
>

 

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