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CJ6 Primer left /Right and manual pomp

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airmanv2

Joined: 01 Dec 2013
Posts: 49
Location: France - Normandy

Posted: Tue Dec 03, 2013 3:41 am Post subject: CJ6 Primer left /Right and manual pomp

Hi every Body, 

I'm a (the) new french owner of a Uk reg. CJ6A based LFAO.

I have question regarding the start up procedure. 

At his time I was told to pull 9 blades, prime 4 strokes, manual pomp 6 times.

Pressure in the air tank at 40 Kg, propeller turn slowly and some time i do not succeed to start.

So I pull again 9 blades, 4 strokes an 4 manual pomp again and some time its fine , some time not.

Some time a third try and if not start I have a to low air pressure  and must refile the air tank .

Question: is that the correct method to practice?

Question? I saw that the primer can be turn right or left but I don't now the reason and how it must be used?

thanks for help

Bruno

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cjpilot710(at)aol.com
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Posted: Tue Dec 03, 2013 9:38 am Post subject: CJ6 Primer left /Right and manual pomp

Bruno.

 The primer is pretty simple.  It does not matter which way it turns  when fully down, as long as it locks down.  If you have pulled it up to  prime, when you push it down, you must turn it 90 degrees (in either  direction) in order for it to close and lock.  If you do not turn it  90 degrees, the primer will let a lot of fuel flow though, and flood #9 cylinder  which at lower power settings causes the engine to run rough.  I've seen  two occasions where the valve in the bottom of the primer has screwed  up, causing the engine to run rough, thus needing to replace the primer.   (Simple job)

  

 Your starting procedure sound OK for the most part.  Pulling the prop  though 9 times really is only making sure you do not have a hydraulic lock  in the bottom cylinders.  Having one could (most likely WILL) cause  you to bend a connecting rod, which will lead to a engine failure.   Promise. 

  

 I have over 2,000 hours with the M-14 and Hs6a engines in my  log.  I don't use the procedure the Chinese call for in the book,  except on a cold day.  I've found that priming 4 to 6 times,  than pumping the wobble pump until I see the fuel pressure gage rise,  is enough for the HS6.  On the M-14p all I do is pull the prop though  checking for a hydraulic lock, climb in the cockpit, prime 4 times (on a cold  day 6), hold the pre-oil switch until I get oil pressure on the gage, and hit  the starter button.  3 blades and she's running.

  

 On the HS6 engine you can turn the mags on first, before pushing the  starter button. (Not a good idea on the M-14p).  Some times you will get  a "kick or two" during the start.  Be prepared to pump the primer  once or twice or even three times, to try and catch it.  If you do  this, make sure you close and lock the primer after the engine is running.   (BTW you can run the engine just by pumping the primer - knowing that  has saved my ass.)  

  

 You can "flood" (to much fuel) these engines.  If you think you have  flood one, simply during start while still pushing the start button, open the  throttle all the way.  BE READY TO CLOSE IT IF THE ENGINE STARTS!!   Doing this - leans out the mixture for a start.

  

 Some times the "buzz box" "Shower of Sparks" or 'Exciter" might be weak or  inop.  This can make the engine hard to start.  If you press the start  button and hear a healthy buzz up front, its mostly likely working.

  

 Your air pressure sounds a little low but is more than enough.  These  engines can be hand started easily.  So I don't believe 40 atmospheres is  not your problem. 

  

 Hope this helps. Good luck.

  

 Jim "Pappy" Goolsby

  

  

  

  

  

  

  In a message dated 12/3/2013 6:43:01 A.M. Eastern Standard Time,  bruno.blanchard2(at)gmail.com writes:

  	  Quote: 	
		  -->    Yak-List message posted by: "airmanv2"    <bruno.blanchard2(at)gmail.com>



Hi every Body, 

I'm a (the) new    french owner of a Uk reg. CJ6A based LFAO.

I have question regarding the    start up procedure. 

At his time I was told to pull 9 blades, prime 4    strokes, manual pomp 6 times.

Pressure in the air tank at 40 Kg, propeller    turn slowly and some time i do not succeed to start.

So I pull again 9    blades, 4 strokes an 4 manual pomp again and some time its fine , some time    not.

Some time a third try and if not start I have a to low air    pressure  and must refile the air tank .

Question: is that the correct    method to practice?

Question? I saw that the primer can be turn right or    left but I don't now the reason and how it must be used?

thanks for    help

Bruno



--------

Fly safe





Read this topic    online    here:



http://forums.matronics.com/viewtopic.php?p=414766#414766

	


 [quote][b]

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jdeuchar

Joined: 22 May 2013
Posts: 9

Posted: Tue Dec 03, 2013 9:39 am Post subject: CJ6 Primer left /Right and manual pomp

Hi Bruno,



I use (when cold):

Pull through 9 blades. This way I know if I have an issue before introducing 

fuel.

Prime 6 shots

Pull through 6 blades

Prime 2 - 4 shots, leaving the primer up

Pump until fuel pressure shows good with throttle closed.

Throttle cracked

Start - if it hasn't run for a long time, it will take me twice with the 

above, also prime while starting, or pumping the throttle (accelerator pump) 

works same.



As far as primer open left or right, it doesn't matter, it is just to get it 

unlocked.



Jeff



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airmanv2

Joined: 01 Dec 2013
Posts: 49
Location: France - Normandy

Posted: Tue Dec 03, 2013 2:45 pm Post subject: Re: CJ6 Primer left /Right and manual pomp

Hello Jim and Jeff, Thank you for help, 

I think i will try this WE, I ll keep you advice.

Best, 

Bruno

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Harv

Joined: 01 Jul 2010
Posts: 172

Posted: Wed Dec 04, 2013 5:33 am Post subject: Re: CJ6 Primer left /Right and manual pomp

Hi Bruno



I have the sister of your aircraft (1 serial number out!) in the UK 



Mine used to be very hard to start until I discovered the shower of sparks (boost coil) was not working.



A way to check if boost coil works is to get the engine running nicely and then at idle power and simultaneously whilst turning the mags off then press the start button. If with the start button pressed in and held there and the mags turned off the engine continues to run then the boost coil is working. IF the engine dies then there is a problem with the start coil.



I do not recommend doing this for long periods of time as air will be injected into the cyls.



I've found the primer on mine can be inclined to draw ALOT of air during the priming stokes if you rush pulling up the primer handle. Make sure you get 4 to 6 full shots of fuel prime.



Also be aware the top knurled nut (part of the primer body) can be tightened to give more or less resistance to moving the leaver up and down. I have found this also seems to affect the amount of air that gets drawn in during priming so check it and if its loose (tighten by hand only).



With the wobble pump, use it as much as required to get the fuel gauge (with engine instruments turned on) showing pressure.



Rgs

Harv

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airmanv2

Joined: 01 Dec 2013
Posts: 49
Location: France - Normandy

Posted: Mon Dec 09, 2013 12:03 pm Post subject: Re: CJ6 Primer left /Right and manual pomp

thanks for all your advices

i made a mix  off all and finally succeed to start and made a marvelous flight just before the night.



1/2 hour eating the engine with an electric fan in the hangar

18 blades

moving out

9 blades

batt + eng instr on

primer up

wobble pomp 6 times

3 primers slowly

3 blades

3 primers slowly

closing the drain 

wearing the chute, tightened in the seat, open Air (35 atm)

throttle open 2 inches, 

press start, engine wanted to start , helping with throttle and primmer ....

..... i had forgotten the Mag. !!!  

Second try after a couple of minutes (3 blades more, 3 prime)

And engine run after 2 blades 

YES!!!

thank you for your help

Bruno

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