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General Category => General Discussion => Topic started by: DougKauer on February 16, 2016, 12:23:43 PM

Title: gas lines
Post by: DougKauer on February 16, 2016, 12:23:43 PM

Does anyone know the size of the gas line coming
 up to the carbs, the one that feeds into the carbs. Inside and outside diameters. In need to replace one on my left side as it is leaking alittle. Tried a zip tie, but not working. Do these have any kind of clamp that is suppose to go on them?.   Thanks for any info   Doug

Title: Re: gas lines
Post by: rminier on February 16, 2016, 01:10:13 PM

 Buy some 7/32" inch fuel tubing for the Kawi's. The much more common 1/4" tube is a sloppy fit on the carb fittings. These sleds originally had the little spring type clamps on the fuel connections, but if you use 7/32" stuff it fits so tightly you hardly need a clamp. I usually stick the end of the hose in a glass of hot water to soften it up before sticking the hose on to the carb fitting, then it sticks like glue.
 The 7/32" tubing is tougher to find, but it's worth it.

Title: Re: gas lines
Post by: gixxer6 on February 16, 2016, 01:29:35 PM

I use the larger stuff.  If you get the good quality stuff and put it on with a good zip tie it won't leak.  Once the line gets old and hardens, it can't be reused... 

Title: Re: gas lines
Post by: Lloyd (ljm) on February 16, 2016, 05:09:17 PM

 I have had very good luck using 1/4 inch black automotive fuel line.  Holds on tight, stays flexible no leaks. I have yet to clamp any of it with anything

Title: Re: gas lines
Post by: DougKauer on February 17, 2016, 02:13:52 AM

So, gixxer6 you are saying stick with the 1/4" and not the 7/32" and find some clamps or use a zip tie.

Title: Re: gas lines
Post by: Doug in NY on February 17, 2016, 11:30:05 AM

I recently tried tygon lines which I bought at NAPA. They cost more $, and reviews said they hold up to ethanol gasoline. The 1/4 fit the carb nice, no clamp needed. The 1/8 was a tight fit, but made it for the power jet at carb bowl.

Title: Re: gas lines
Post by: Interceptor398 on February 17, 2016, 06:37:55 PM

Parts book says 7/32 for the lines connected to the fuel pump.  7/32 should not need a clamp but 1/4 will.  I'm going thru this with my 81 Invader getting ready for Braapfest.  Cleaned carbs with new O-rings, all new gas lines, rebuilt fuel pump, new primer pump and the gas tank removed and cleaned.  I sure hope that is the not running so good issue.

Title: Re: gas lines
Post by: wisc79intruderguy on February 18, 2016, 08:40:38 AM

I thought I remember dennis kirk having those spring clamps I don't use hose clamps they tear the fuel line.

Title: Re: gas lines
Post by: Interceptor398 on February 18, 2016, 09:40:23 AM

I got my tubing from a local small engine place ( Boyd's Outdoor Power in Dresser WI )  They had all the correct sizes ( 3.5mm, 3/32,  7/32 and 1/4 ) but the Tygon is a bit expensive.

Title: Re: gas lines
Post by: DougKauer on February 18, 2016, 11:57:32 AM

Is 7/32 the inside or is it the outside diameter ?

Title: Re: gas lines
Post by: Interceptor398 on February 18, 2016, 12:13:07 PM

All the sizes are list for inside diameters.

Title: Re: gas lines
Post by: DougKauer on February 19, 2016, 01:26:58 AM

Thanks, for all the info  8)

Title: Re: gas lines
Post by: Teherr on February 19, 2016, 04:50:46 AM

Use automotive thick black line for the impulse line.  Thin  wall fuel line absorbs some of the impulse and thus pumps less fuel.

Title: Re: gas lines
Post by: gixxer6 on February 19, 2016, 07:07:17 AM

Using the translucent line allows you to see if there are fuel pump or flooding problems by seeing fuel in the line. 

Title: Re: gas lines
Post by: jimvw57 on February 21, 2016, 05:37:31 PM

I got a bunch of 7/32 tubing from Shadetree, it was a pink-ish color and it has worked well for years, no leaks, no clamps needed.