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Fuel Line Size

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Ken Potter

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

Posted: Sat Nov 21, 2009 5:11 am Post subject: Fuel Line Size

Hi folks;



I was installing my fire-wall-forward fuel lines yesterday (Rotax 582).  The plans for my model II show the line from the gascolator to fuel pump as 5/16" however both the gascolator and fuel pump have 1/4" fittings. 

What size does everyone else out there use for this line??



Cheers

Ken

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

dave

Joined: 22 Sep 2006
Posts: 1382

Posted: Sun Nov 22, 2009 3:19 am Post subject: Re: Fuel Line Size

Ken, 



I would suggest  1/4 " lines throughout.  Wing tank fittings might need 5/16s depending fittings.  Larger line would be over kill on the 582



Once plumbed run a gravity flow fuel test.  Your 582 will burn up to 30 litres/ hour at wide open. I Think you should see about 40 litres/hour with gravity test alone. 

1/4" from gascolator forward will do you fine. Use fire sleeve forward of firewall but if you registered as Ultralight in Canada you don't have to but it a good idea. Blue urethane fuel line is a great choice. Use safety wire double looped and not tie wraps as they don't seal as well.  Don't use plastic or gear clamps either. 



Impulse line 1/4" heavy wall urethane or  fuel injection line up to 12 " long .

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Ken Potter

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

Posted: Sun Nov 22, 2009 6:38 am Post subject: Re: Fuel Line Size

Thanks Dave;



Yesterday I installed 1/4" Bing blue fuel line from the gascolator to the pump, and from the pump to the carbs.  I used a piece of R-9 injector hose for the impulse line.  All lines, including primer, impulse, and oil injection are fire shielded.



In addition,  I removed the header tank behind the seat and replaced the hoses that the previous builder had installed with ethanal resistant 5/16" R-9 injector hose.  As well I replaced the vent line with 1/4" Bing.



Cheers,



Ken

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

Guy Buchanan

Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA

Posted: Sun Nov 22, 2009 9:50 pm Post subject: Fuel Line Size

At 05:11 AM 11/21/2009, you wrote:

 	  Quote: 	
		  What size does everyone else out there use for this line??


	


1/4".

Guy Buchanan

San Diego, CA

K-IV 1200 / 582-C / Warp / 400 hrs. and counting

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