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nigel.willson(at)yakdispl
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 Posted: Wed Nov 07, 2018 11:57 pm Post subject: Yak52: one second cuts during full power |
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Help please. Not my '52, but a good friends.....
NOTE this is NOT caused by mag coils breaking own or intermittent mag switches - these have all been changed/checked. So if anyone has some other ideas I'd be grateful to hear.
So.. here's the symptoms:
"It’s always just a one second dead cut. And it’s only on full throttle but it’s always a full one second chop and return. Can happen upright or inverted."
Any other ideas anyone?
Regards,
Nigel Willson
Flying Instructor & Examiner | Airshow Organiser | Display Pilot
Mobile:
+44 (0)7809 116676
Email:
nigel.willson(at)yakdisplay.com
Web:
http://easyppl.com
http://greatbritishairshows.com
http://yakdisplay.com
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Looigi
Joined: 20 Apr 2015
Posts: 80
Location: Christchurch, New Zealand
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| Posted: Thu Nov 08, 2018 1:02 am Post subject: Re: Yak52: one second cuts during full power |
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Hi Nigel,
If you are running the Russian plugs I would check their resistance. I had the same symptom and found I had an intermittent mag coil failure caused by high resistance plugs. Reject any that are over 5000 ohms.
Since fitting that Auto plugs I have not had any issues.
Chris
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mark.bitterlich(at)navy.m
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| Posted: Thu Nov 08, 2018 10:58 am Post subject: Yak52: one second cuts during full power |
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Fuel Venting?
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dsavarese0812(at)bellsout
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| Posted: Thu Nov 08, 2018 11:54 am Post subject: Yak52: one second cuts during full power |
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Has anyone bothered to check/clean the fine fuel screen on the
firewall? How about the fuel screen in the carburetor? It's the 22mm
nut just above the 90 degree elbow where the fuel enters the
carburetor. Not only should you pull out the fuel screen, but also use
a flashlight and mirror and look deep into the cavity to make sure there
are no large particles (typically it will be rubber) obstructing the
opening at the very back of the screen cavity. Large particles will not
be able to move into the screen.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 11/8/2018 1:55 PM, Bitterlich, Mark G CIV NAVAIR, WD wrote:
[quote]
Fuel Venting?
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