Today's Message Index:
----------------------
1. 06:43 AM - Re: DIFFICULT START -52 (A. Dennis Savarese)
2. 07:00 AM - Re: DIFFICULT START -52 (Pedro Cerveira Pinto)
3. 08:59 AM - Re: Re: Air Leak Advice (Bitterlich, Mark G CIV NAVAIR, WD)
4. 10:19 AM - Re: Air Leak Advice (AcroGimp)
5. 05:45 PM - Re: DIFFICULT START -52 (Roger Kemp)
6. 05:54 PM - Re: Propeller Overhaul in Canada (Elmar & Manuela)
Message 1
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| Subject: | Re: DIFFICULT START -52 |
Only one comment. Although the CJ and Yak 52 primer pumpknobs look the
same, the Yak 52 uses the primer pump knob turned to the left to
pressurize the fuel system. When the primer pump knob is turned to the
right, it primes the "cylinder" side. So when the primer pump knob is
turned to the left and pumped briskly, it will pressurize the fuel
system and thus give a fuel pressure indication on the fuel pressure
instrument.
I have found unless you pump fairly briskly with the knob turned to the
left, it may not give a fuel pressure indication.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 4/13/2015 10:16 PM, Walter Lannon wrote:
>
> Chances are there is nothing wrong with your carburettor. If the
> engine was inhibited for storage it is quite likely the carb. was done
> as well. There is a specific process in the manual (at least for the
> Huosai so I assume also in the M14 manual) to clean the oil out of
> it. It could take a very long time to get it operational if that is
> not done.
> Also check the small tube in the throat of the carb. As part of the
> storage process it may be capped off with a rubber condom. If so the
> diaphragm chamber does not sense atmospheric pressure and the carb.
> will not function.
> Not being familiar with the Yak 52 I don't know which way it turns for
> priming (I would guess to the left). The CJ uses the same primer but
> is plumbed to prime from either side since it has a separate emergency
> pump. There would be no fuel pressure indication from priming since
> the fuel goes directly into the induction system.
>
> Walt
>
> -----Original Message----- From: Bill1200
> Sent: Monday, April 13, 2015 11:47 AM
> To: yak-list@matronics.com
> Subject: Yak-List: DIFFICULT START -52
>
>
> Background:
> Just replaced engine with, as far as we can tell from the Russian
> logs, an IRAN engine that has been sitting for 10 years. Initially,
> very difficult to start, requiring essentially constant priming to
> keep it turning. Replaced carburetor with old one off prior engine I
> was using. Now runs well but still requires lots of priming once it
> fires, for a few seconds.
> Have noticed when primer knob turned to left to pressurize system,
> nothing is showing on fuel pressure gage. Once started, fuel pressure
> normal
> Thoughts?
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=440793#440793
>
>
Message 2
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| Subject: | Re: DIFFICULT START -52 |
Probably you have air in primer fuel system hose(Top right).Just release a
little bit the nut of corresponding hose and pump until fuel goes out and
you have fuel pressure on system indicator.
Good luck
2015-04-14 14:42 GMT+01:00 A. Dennis Savarese <dsavarese0812@bellsouth.net>:
> dsavarese0812@bellsouth.net>
>
> Only one comment. Although the CJ and Yak 52 primer pumpknobs look the
> same, the Yak 52 uses the primer pump knob turned to the left to pressurize
> the fuel system. When the primer pump knob is turned to the right, it
> primes the "cylinder" side. So when the primer pump knob is turned to the
> left and pumped briskly, it will pressurize the fuel system and thus give a
> fuel pressure indication on the fuel pressure instrument.
>
> I have found unless you pump fairly briskly with the knob turned to the
> left, it may not give a fuel pressure indication.
> Dennis
>
> A. Dennis Savarese
> 334-546-8182 (mobile)
> www.yak-52.com
> Skype - Yakguy1
>
>
> On 4/13/2015 10:16 PM, Walter Lannon wrote:
>
>>
>> Chances are there is nothing wrong with your carburettor. If the engine
>> was inhibited for storage it is quite likely the carb. was done as well.
>> There is a specific process in the manual (at least for the Huosai so I
>> assume also in the M14 manual) to clean the oil out of it. It could take
>> a very long time to get it operational if that is not done.
>> Also check the small tube in the throat of the carb. As part of the
>> storage process it may be capped off with a rubber condom. If so the
>> diaphragm chamber does not sense atmospheric pressure and the carb. will
>> not function.
>> Not being familiar with the Yak 52 I don't know which way it turns for
>> priming (I would guess to the left). The CJ uses the same primer but is
>> plumbed to prime from either side since it has a separate emergency pump.
>> There would be no fuel pressure indication from priming since the fuel goes
>> directly into the induction system.
>>
>> Walt
>>
>> -----Original Message----- From: Bill1200
>> Sent: Monday, April 13, 2015 11:47 AM
>> To: yak-list@matronics.com
>> Subject: Yak-List: DIFFICULT START -52
>>
>>
>> Background:
>> Just replaced engine with, as far as we can tell from the Russian logs,
>> an IRAN engine that has been sitting for 10 years. Initially, very
>> difficult to start, requiring essentially constant priming to keep it
>> turning. Replaced carburetor with old one off prior engine I was using. Now
>> runs well but still requires lots of priming once it fires, for a few
>> seconds.
>> Have noticed when primer knob turned to left to pressurize system,
>> nothing is showing on fuel pressure gage. Once started, fuel pressure normal
>> Thoughts?
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=440793#440793
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
--
Pedro Cerveira Pinto
Message 3
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| Subject: | Re: Air Leak Advice |
Roger that. !!
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of AcroGimp
Sent: Monday, April 13, 2015 11:38 PM
Subject: Yak-List: Re: Air Leak Advice
Thanks again Mark. My mechanic is quite versed in the Yak, the confusion is me
a new operator.
Taking your advice today I merely set UP on the handle and left it during my formation
sortie, it pumped up to 50 and regulated just fine (I didn't time it and
it was a long flight but I noticed it was at 50 during maybe 2nd ops check
so about 20-30 minutes in) - I figure there probably was a leak with the check
valve to snot valve (with compressor going) and I was impatient last time I flew.
Thanks all for the inputs. I am sure there will be other things but I think this
issue may be closed.
'Gimp
--------
Owner/Pilot N6209F 1987 Yak-52
COMM/ASEL/IFR/HP-Complex/TW
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=440827#440827
Message 4
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| Subject: | Re: Air Leak Advice |
mark.bitterlich(at)navy.m wrote:
> Roger that. !!
>
> --
It was the 'chasing ghosts' comment Mark - perfectly stated and well-timed.
The plane is still new enough to me that I am still figuring out what 'normal'
really is and I was paranoid about air system issues since I got stranded away
from base once before we figured out the start valve was going. Replaced that,
then the check valves and now it seems to be fine but I needed to just let
it operate normally and see that it would pump up OK which it did.
Thanks again to you and Dennis in particular for good advice about not falling
into the trap of shotgun/swaptronics type troubleshooting. I feel much better
now.
'Gimp
--------
Owner/Pilot N6209F 1987 Yak-52
COMM/ASEL/IFR/HP-Complex/TW
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=440847#440847
Message 5
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| Subject: | Re: DIFFICULT START -52 |
First place I would look is the Banjo fittings going into the carb. Did you replace
the aluminum crush washers or use the old ones.
Doc
Sent from my iPad
> On Apr 13, 2015, at 1:47 PM, Bill1200 <billdykes52@hotmail.com> wrote:
>
>
> Background:
> Just replaced engine with, as far as we can tell from the Russian logs, an IRAN
engine that has been sitting for 10 years. Initially, very difficult to start,
requiring essentially constant priming to keep it turning. Replaced carburetor
with old one off prior engine I was using. Now runs well but still requires
lots of priming once it fires, for a few seconds.
> Have noticed when primer knob turned to left to pressurize system, nothing is
showing on fuel pressure gage. Once started, fuel pressure normal
> Thoughts?
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=440793#440793
>
>
>
>
>
>
>
>
>
>
Message 6
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| Subject: | Re: Propeller Overhaul in Canada |
Hi Jeff,
you might want to give these guys a
call, they might be able to help you
out having your CJ propeller overhauled
within Canada.
http://www.hopeaero.com/
All the best.
cheers
Elmar
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