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Engine basics => Engine set up tips => Topic started by: frank mccune on July 01, 2015, 06:13:25 AM

Title: What type of fuel line for clunk tanks?
Post by: frank mccune on July 01, 2015, 06:13:25 AM

    Hi All:

    What type of fuel line works best for making a clunk tank? Where would one purchase it?

                                                                                              Tia,

                                                                                              Frank

Title: Re: What type of fuel line for clunk tanks?
Post by: Larrys4227 on July 01, 2015, 07:01:47 AM

I use the smallest Sullivan tubing ... think it's 3/32".  It's extremely flexible and has no problem flopping around in even the smallest tanks.

Title: Re: What type of fuel line for clunk tanks?
Post by: Tim Wescott on July 01, 2015, 01:07:46 PM

And if you can't buy it from your local hobby shop, buy it online -- Tower Hobby may be your best bet.

A couple of notes:

I use the smallest possible tubing for 3 ounce tanks, with an ID of about 1/16".  That won't fit over most clunks, so I whack off the nipple on the clunk and replace it with a piece of 3/32" OD brass or copper tubing.

Hayes makes even more flexible tubing that they sell with their tanks.  It's black.  I think some searching on Tower will find it for you.  I also don't think it's necessary, but you may prefer it.

Title: Re: What type of fuel line for clunk tanks?
Post by: Steve Helmick on July 01, 2015, 03:48:10 PM

Frankly, (see what I did there?) I'd throw out an old clunk tank and get a new one. Plastic doesn't last forever, at least, not while remaining useful. The "rubber" plugs, tubing and stuff all degrades. Hayes, DuBro and Sullivan clunk tanks are easy to get and cheap. I listed them in order of preference...but it's my preference, so it doesn't count for a lot.  n~ Steve

Title: Re: What type of fuel line for clunk tanks?
Post by: Tim Wescott on July 01, 2015, 05:16:45 PM

Quote from: Steve Helmick on July 01, 2015, 03:48:10 PM

Frankly, (see what I did there?) I'd throw out an old clunk tank and get a new one. Plastic doesn't last forever, at not while remaining useful. The "rubber" plugs, tubing and stuff all degrades. Hayes, DuBro and Sullivan clunk tanks are easy to get and cheap. I listed them in order of preference...but it's my preference, so it doesn't count for a lot.  n~ Steve

Sullivan and DuBro clunk tanks ship with the same tubing whether they're quart capacity or 2oz.  If you want the clunk to actually work in a smaller tank you need smaller tubing than what comes with the tank.

Hayes tanks just work.

Title: Re: What type of fuel line for clunk tanks?
Post by: Phil Krankowski on July 01, 2015, 07:01:28 PM

I got some food/medical silicone tubing that is very limp.  It has a thin wall.

3/32 ID x 5/32 OD

I bought a package on ebay, and used it on some smaller clunk tanks (under 4 oz) with excellent results.  Even a Sullivan slant 1 oz moves properly.  Larger tanks (4 oz ad bigger) don't need extra limp clunk lines, medium silicone is fine.

Phil