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SuperBee making backfire

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Old 04-13-2012, 02:06 PM
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leopaul
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Default SuperBee making backfire

I started my engine that came back at 0hres from JC. It make a strange noise at idle, like backfire, or pouf.......pouf.pouf.............pouf............. ........pouf.pouf.pouf...... I have never seen this before....At higher throttle, up to top rpm, it sound OK....

Do someone have an idea of what is going on??

Thanks,
Alex


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Old 04-13-2012, 07:13 PM
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Default RE: SuperBee making backfire

Are you using fresh fuel? That symptom is very common when fuel has some water in it!
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Old 04-13-2012, 07:27 PM
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Default RE: SuperBee making backfire

Well, this is the first time i heard this...I'm using last summer fuel (around 10l) mixed with a new 10l....

I will try this weekend with fresh fuel to see if there any improvements...
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Old 04-14-2012, 05:50 AM
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Default RE: SuperBee making backfire

leopaul:


It is possible the fuel is contaminated with algae or similar. I remember a few years ago when flying with Todd (Dreamworks) everytime he started the take off roll, pop pop then flame out. Turned out to be bad fuel.

Also, we only require 2.5% oil ratio for mix. The Bee may be sensitive to 5% if this is what you are using.

You said it was recently serviced. Which of our facilities performed the service? Did you receive a document of what was done? Please let me know.

Thanks,
Eric
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Old 04-15-2012, 12:05 PM
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Default RE: SuperBee making backfire

Put fresh fuel today with precisely 2.5% dte light

Still backfire at idle....

Clogged injector will do something similar?

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Old 04-15-2012, 03:21 PM
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Default RE: SuperBee making backfire

I used to have a Jetcentral Turboprop that is based on the same turbine. Mine did make the same noise at idle but it would stopped as soon as soon as I would move the throttle. The hotter the day, the more noise (if you could call it that way...) it would make. Don't recall having that noise on winter days.
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Old 04-15-2012, 03:27 PM
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Default RE: SuperBee making backfire

That is true, as soon as i exceed around 100k , it doesn't make it anymore....

But the strange thing is that my other Bee or even all my others JC had never done that...??
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Old 04-19-2012, 03:50 PM
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Default RE: SuperBee making backfire

Someone else had another idea of what can cause the backfire??
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Old 07-23-2012, 09:35 AM
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Default RE: SuperBee making backfire

Engine is back to Mexico for analysis.

Will post update soon
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