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First engine start

 
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Ken Potter



Joined: 18 Aug 2007
Posts: 85
Location: Lanark, Ontario

PostPosted: Fri Jun 04, 2010 5:43 pm    Post subject: First engine start Reply with quote

Hi Folks,
In preparation for final inspection I started my Rotax 582 for the first time. It fired on the first revolution however after 30 seconds or so I noticed smoke and shut down. Inspection revealed gas pouring out of both carbs. I opened both float chambers but did not see anything obviously wrong. I'm new to bing carbs so, before I start searching on the net or manuals can anyone give me some "quick hits" to cure.
BTW, the engine ran much smoother than I thought it would on first start!!!!
Cheers
Ken


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Ken Potter
Model II, No. 483
Rotax 582, C-Box,
99% Complete
C-FJKP
Lanark, Ontario
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Rical26



Joined: 27 Mar 2008
Posts: 15

PostPosted: Fri Jun 04, 2010 8:32 pm    Post subject: First engine start Reply with quote

HI Ken, if you use the choke, as soon as engine start, shift the
throttle slowly to about 2500 rpm and remove choke as soon as possible.
(prolonged use of choke can cause engine to flood (rotax 582 book page 8
section 4 starting procedure

hope this help!

Richard
Carlsbad Springs Ontario Canada
Kitfox 4 582 C 123hours C-FPVV

Ken Potter wrote:
Quote:


Hi Folks,
In preparation for final inspection I started my Rotax 582 for the first time. It fired on the first revolution however after 30 seconds or so I noticed smoke and shut down. Inspection revealed gas pouring out of both carbs. I opened both float chambers but did not see anything obviously wrong. I'm new to bing carbs so, before I start searching on the net or manuals can anyone give me some "quick hits" to cure.
BTW, the engine ran much smoother than I thought it would on first start!!!!
Cheers
Ken

--------
Ken Potter
Model II, No. 483
Rotax 582, C-Box,
98% Complete
C-FJKP (marks reserved)
Lanark, Ontario


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Tom Jones



Joined: 12 Mar 2006
Posts: 752
Location: Ellensburg, WA

PostPosted: Sat Jun 05, 2010 5:29 am    Post subject: Re: First engine start Reply with quote

ken, where was the fuel pouring out of the carbs? If it was pouring out the vent lines the needle valve is stuck open or there is too much fuel pressure. have you installed an aftermarket fuel pump?

It is not unusual for a two stroke engine to smoke when first started.

You said you didn't want to start searching on the internet. No need to search. Here it is http://www.800-airwolf.com/articles.htm first read part 24 then 10 and 11.


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dave



Joined: 22 Sep 2006
Posts: 1382

PostPosted: Sat Jun 05, 2010 6:09 am    Post subject: Re: First engine start Reply with quote

You do not need a aftermarket pump in addition to the gravity flow and the mikuni pump. Any extra could cause the needles to not seat.

With fuel turned on and engine off it should not leak. A faulty primer can allow flue to flow when not running.


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Ken Potter



Joined: 18 Aug 2007
Posts: 85
Location: Lanark, Ontario

PostPosted: Sat Jun 05, 2010 7:01 am    Post subject: Re: First engine start Reply with quote

Hi Folks,

The gas was coming out of the overflow holes for the float chambers. I adjusted the floats to close the needle earlier. No fuel leak. But the engine will only idle and run if the choke is on. When I open the throttle it dies. Any ideas???

Ken


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Ken Potter
Model II, No. 483
Rotax 582, C-Box,
99% Complete
C-FJKP
Lanark, Ontario
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dave



Joined: 22 Sep 2006
Posts: 1382

PostPosted: Sat Jun 05, 2010 7:05 am    Post subject: Re: First engine start Reply with quote

Do you have a tube on the over flow vents?

You should have a loop of 1/8 " line from the front vent to rear vent that droops in under the float bowl . use a soldering gun and melt 3 holes in the bottom of that tube under the float bowl.


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Ken Potter



Joined: 18 Aug 2007
Posts: 85
Location: Lanark, Ontario

PostPosted: Sat Jun 05, 2010 9:28 am    Post subject: Re: First engine start Reply with quote

Thanks Dave and everyone else.

Dave, by the way, I broke in the engine using that GSC IFA prop you sold me last winter. Seems to be well matched to the plane from the ground run -up I did.

Ken


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Ken Potter
Model II, No. 483
Rotax 582, C-Box,
99% Complete
C-FJKP
Lanark, Ontario
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akflyer



Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

PostPosted: Sat Jun 05, 2010 1:05 pm    Post subject: Re: First engine start Reply with quote

dave wrote:
You do not need a aftermarket pump in addition to the gravity flow and the mikuni pump. Any extra could cause the needles to not seat.

With fuel turned on and engine off it should not leak. A faulty primer can allow flue to flow when not running.


I can tell you one instance where my back up electric pump saved my a$$. Right after take off from a very remote field, I noticed my fuel flow dropping from what should have been 7.2-7.4 GPH at take off to about 5.3 GPH and dropping. I flipped on the electric pump and the fuel flow went back up to normal. I climbed out and headed for home and as soon as I pulled back to cruise setting flipped the electric back up off. Flow went from 5.3 down to 3.8 or there abouts. I kicked the electric back on and flow went back to normal. I arrived back at the home lake and found the fuel filter off the header tank plugged. I pulled it out and it looked clean, but you could hardly blow through it.

Had I not had the flow meter and the back up electric pump, the plane would have been destroyed in the trees and I would have had one heck of a hike out of there to get back to civilization. Between the mikuni and the electric pump I was able to maintain adequate fuel flow to keep the engine running.

I now carry spare filters.


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dave



Joined: 22 Sep 2006
Posts: 1382

PostPosted: Sun Jun 06, 2010 3:51 am    Post subject: Re: First engine start Reply with quote

Extra pump not needed for run up and breakin. That "could be" be causing the needles to not seat from the pressure. Extra pump optional.

Fuel liters clogging ? Do not use Paper element filter s a huge NO NO .
Once they get water on them they swell up and I think ethanol gas makes those paper filter turn ugly as well.

A faulty primer will usually cause the carb to drip when turned off.
I don;t think it would cause it to run rich.

Time to get my floats on soon ...............


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