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  Topic: Air and fuel bottle preservation
1906

Replies: 1
Views: 18

PostForum: Yak-List   Posted: Sun Jan 16, 2022 3:18 pm   Subject: Air and fuel bottle preservation
What is the best way to preserve (long term) some compressed air and debubbler tank spares? I currently have them in air tight zip locks with dessicant bags inside. I know items like oil coolers and t ...
  Topic: M9/M9F/M9-35M magneto differences
1906

Replies: 6
Views: 93

PostForum: Yak-List   Posted: Sat Jan 08, 2022 8:04 am   Subject: Re: M9/M9F/M9-35M magneto differences
Thank you for the input everyone. I was aware of the high level functional differences between the 3; was looking for input on what parts need to be changed internally to convert them into an M9F. As ...
  Topic: M9/M9F/M9-35M magneto differences
1906

Replies: 6
Views: 93

PostForum: Yak-List   Posted: Fri Jan 07, 2022 10:10 am   Subject: M9/M9F/M9-35M magneto differences
Does anyone know what changes are needed for an M9 to be made into an M9F?

M9-35M to M9F?
  Topic: Primer handle squeaky/not smooth
1906

Replies: 7
Views: 160

PostForum: Yak-List   Posted: Fri Dec 31, 2021 9:11 am   Subject: Re: Primer handle squeaky/not smooth
One more question. Any way to stop the fuel going to the primer? Last time the primer was apart, fuel as gushing out and made a big mess.
  Topic: Primer handle squeaky/not smooth
1906

Replies: 7
Views: 160

PostForum: Yak-List   Posted: Thu Dec 30, 2021 1:45 pm   Subject: Re: Primer handle squeaky/not smooth
Thank you, Dennis. Ordered.
  Topic: Primer handle squeaky/not smooth
1906

Replies: 7
Views: 160

PostForum: Yak-List   Posted: Thu Dec 30, 2021 12:46 pm   Subject: Primer handle squeaky/not smooth
I recently replaced the o-ring for the primer handle and it's not very smooth to pump. I read somewhere that someone lubed their o-ring prior to installation? Any recommendations?
  Topic: Compressor troubleshooting before replacing
1906

Replies: 15
Views: 310

PostForum: Yak-List   Posted: Sun Nov 28, 2021 5:11 pm   Subject: Compressor troubleshooting before replacing
The compressor stopped building up pressure last two flights.
Engine has 600+ hours - fairly certain it is the original compressor.
There are no leaks in the system while the airplane is parked.

...
  Topic: Exhaust flames on takeoff?
1906

Replies: 3
Views: 207

PostForum: Yak-List   Posted: Sat Nov 06, 2021 9:28 am   Subject: Exhaust flames on takeoff?
Was looking at a video made during a flight close to sunset and I noticed on takeoff (before getting off the ground) a few quick flames shot out of the exhaust.

Is this normal or is it an indicatio ...
  Topic: Primer hand pump stuck
1906

Replies: 1
Views: 242

PostForum: Yak-List   Posted: Wed Oct 06, 2021 6:49 am   Subject: Primer hand pump stuck
I've taken apart the primer handle to replace the o-ring and after the reassembly, it will go into cylinder or system position but it cannot be centered. Has anyone encountered this before? I've disas ...
  Topic: Procedure after extensive downtike?
1906

Replies: 4
Views: 296

PostForum: Yak-List   Posted: Wed Oct 06, 2021 3:43 am   Subject: Re: Procedure after extensive downtike?
What you don't say is whether you had done anything to conserve the engine during these three months. If you are not using an M 14 for over a month, it really is extremely prudent to firstly squirt pr ...
  Topic: Procedure after extensive downtike?
1906

Replies: 4
Views: 296

PostForum: Yak-List   Posted: Wed Oct 06, 2021 3:40 am   Subject: Re: Procedure after extensive downtike?
If it was me, I would treat the engine as a dry engine and pre oil the system.   Also, the oil is draining due to a check valve that is most likely dirty, the oil pump does not need to be changed ...
  Topic: Procedure after extensive downtime?
1906

Replies: 0
Views: 231

PostForum: Yak-List   Posted: Wed Oct 06, 2021 2:36 am   Subject: Procedure after extensive downtime?
I have been doing some airframe work and the engine hasn't run for 3 months. All oil from the tank seems to have drained via intake drain and exhaust (will replace the oil pump eventually). Do I need ...
  Topic: Engine roughness at low power, 82% RPM?
1906

Replies: 10
Views: 1241

PostForum: Yak-List   Posted: Mon Jul 26, 2021 9:22 am   Subject: Re: Engine roughness at low power, 82% RPM?
Not yet. I am hoping to replace the intake gaskets/seals within the next 10 days.
  Topic: FUEL FITTING
1906

Replies: 6
Views: 664

PostForum: Yak-List   Posted: Wed Jul 14, 2021 9:25 am   Subject: Re: FUEL FITTING
I've suggested to the owner than a new piece should be made. You will not find one like this unless you are able to get a hold of the owner of the crashed Yak-55 in Germany a couple of years ago.

P ...
  Topic: Engine roughness at low power, 82% RPM?
1906

Replies: 10
Views: 1241

PostForum: Yak-List   Posted: Fri Jul 02, 2021 12:33 pm   Subject: Re: Engine roughness at low power, 82% RPM?
One more thing - is there an easy way to determine which intake tube might be the culprit? Or might as well do the gaskets on all?
  Topic: Engine roughness at low power, 82% RPM?
1906

Replies: 10
Views: 1241

PostForum: Yak-List   Posted: Fri Jul 02, 2021 12:11 pm   Subject: Re: Engine roughness at low power, 82% RPM?
Thanks Dennis. I figured it might be an intake leak. Will do.
  Topic: Engine roughness at low power, 82% RPM?
1906

Replies: 10
Views: 1241

PostForum: Yak-List   Posted: Fri Jul 02, 2021 11:49 am   Subject: Engine roughness at low power, 82% RPM?
One of the M14Ps I fly seems to be rougher (not quite a popping sound but different than usual and has added vibration) close to landing. 82%, low throttle (very first notch on the Russian manifold pr ...
  Topic: AK50 P-12 compressors
1906

Replies: 12
Views: 1302

PostForum: Yak-List   Posted: Thu Jun 03, 2021 8:01 am   Subject: Re: AK50 P-12 compressors
The P-12 is actually not that much longer. Maybe 2 inches at most.
See picture for comparison.
  Topic: AK50 P-12 compressors
1906

Replies: 12
Views: 1302

PostForum: Yak-List   Posted: Wed Jun 02, 2021 6:25 am   Subject: AK50 P-12 compressors
I know some M14P owners have swapped to these compressors which have been used in the AN-2. Are they a direct swap? Any pros/cons?
Tested in aerobatic applications?
  Topic: Compressor charging
1906

Replies: 21
Views: 2335

PostForum: Yak-List   Posted: Mon May 31, 2021 8:57 am   Subject: Re: Compressor charging
Thanks, Richard. These both have the compressor bypass (water drain as you call it) valve fitted already, but good info to know about the 500 hours.
 
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