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Clunk / filter question
I have been using in all my planes the Dubro #161 tank cluck/filter.
http://bigbikeriders.com/photopost/d...29dubq0600.jpg I use these in both my gassers and nitro planes. I was having trouble with my plane with a OS 1.60FX in it and found that the brass tube had come completely out of the filter stone. Has anyone ever seen this? Is it a fluke? Should I be using something else? I have two filters on my fill cans and thought this would be an extra way to prevent dirt. |
RE: Clunk / filter question
Never heard of that before. Ive been using the felt clunks with no problems
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RE: Clunk / filter question
Coincidently I just bought one of those to redo/repair a fuel tank on my leaf blower when I couldn't locate a Walbro felt clunk. I thought about the possibility of the brass tube seperating from the filter and "Murphy's Law" reminded me not to use one in my planes.;)
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RE: Clunk / filter question
lways thought it was dumb to put a filter in the tank, but Pat Roy said to use one like this.
http://www.brillelli.com/brillelli_engines_004.htm The only thing left in the tank are vapors. The best clunk I ever used! |
RE: Clunk / filter question
ORIGINAL: soarrich lways thought it was dumb to put a filter in the tank, but Pat Roy said to use one like this. http://www.brillelli.com/brillelli_engines_004.htm The only thing left in the tank are vapors. The best clunk I ever used! |
RE: Clunk / filter question
That's exactly the one I had in my leaf blower. The old fuel line was stuck on the plastic nipple and when I tried to twist the fuel line off the plastic nipple it split open at the seam. I couldn't find a similar replacement so I used a Walbro clunk filter with a metal nipple. So be careful when trying to remove a stuck on fuel line if you want to reuse it.
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RE: Clunk / filter question
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RE: Clunk / filter question
Hi Pat,
It's nice to see you up and about, as for a while there you had me very nervy and wondering. Karol |
RE: Clunk / filter question
...he's too close to 10,000 posts to quit now :)
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RE: Clunk / filter question
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Karol |
RE: Clunk / filter question
OK, I'm new to Gas motors and have got a new DL50. In fact, I've not done fuel motors for a long long time as well. Most my stuff is electric. So, I'm looking at some questions here.
1) can all fuel tubing handle both gas as well as fuel? How do you tell the difference. I see you have to use a special stopper in the gas tank. 2) Is it common practice to run the pressure tube off the muffler back to gas tank as you do in fuel planes. If not, do you need to worry about gas leaking out of the vent inlet, does it need a check valve or something? 3) How does it work, the cluncker inside the tank is always to the back of the tank, in a long dive with low gas...how do i make certian that there's no bubbles in the gas line from the clunker being out of the fuel while it went to the front of the tank in the dive. Don't you risk flame out? |
RE: Clunk / filter question
1) Silicone line, such as that used for glow engines, breaks down very quickly in gas. Very quickly. Those running gas use Tygon, Neoprene, or Viton fuel lines. Theere are some other specialized gas lines that someone is sure to mention shortly. Just hang tight.
2) There is no need to pressurize the tank using muffler pressure with gassers. The engines have their own pump so there is no muffler line used. The tank simply vents to the atmosphere. Those overly concerned about small amounts of gas escaping from the vent line build a "trap" in the vent line by looping the vent tubing back over the tank and forward again before exiting the plane. 3) Gas engines are not as susceptable to bubbles in the air line as glow engines, but using the Walbro filter shown in the picture reduces the chance of bubbles in the line to an absolute minimum. Typically the fuel remaining in the line on an extended down vertical is more than adequate to keep the engine running. Likely the plane would hit the ground long before the engine started sputtering. |
RE: Clunk / filter question
ORIGINAL: Pat Roy 1) Silicone line, such as that used for glow engines, breaks down very quickly in gas. Very quickly. Those running gas use Tygon, Neoprene, or Viton fuel lines. Theere are some other specialized gas lines that someone is sure to mention shortly. Just hang tight. 2) There is no need to pressurize the tank using muffler pressure with gassers. The engines have their own pump so there is no muffler line used. The tank simply vents to the atmosphere. Those overly concerned about small amounts of gas escaping from the vent line build a "trap" in the vent line by looping the vent tubing back over the tank and forward again before exiting the plane. 3) Gas engines are not as susceptable to bubbles in the air line as glow engines, but using the Walbro filter shown in the picture reduces the chance of bubbles in the line to an absolute minimum. Typically the fuel remaining in the line on an extended down vertical is more than adequate to keep the engine running. Likely the plane would hit the ground long before the engine started sputtering. |
RE: Clunk / filter question
I don't know what the filter element is composed of and how it would react with glow fuel. If the filter compound is some refined form of plastic then no since nitro is a plastic solvent, but it's worth a try.
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RE: Clunk / filter question
ORIGINAL: Pat Roy I don't know what the filter element is composed of and how it would react with glow fuel. If the filter compound is some refined from of plastic then no since nitro is a plastic solvent, but it's worth a try. |
RE: Clunk / filter question
Is anyone using the ceramic clunk filters, as sold by TBM? Are they better or worst than the felt filters shown in the photo? I have bought both filters but can't decide which one to use? The cermaic ones looks like it will draw fuel to a lower level than the felt type. Any help appreciated. Thks.
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RE: Clunk / filter question
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RE: Clunk / filter question
It's not possible to draw fuel to a lower level than the felt filter. If the felt can gets wet it draws. It's that simple. The only filter or clunk I've ever used that left a tank to within a few drops of dry has been the felt. The sintered bronze types are a waste of money. They only block the big stuff.
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RE: Clunk / filter question
The Walbro 125-527 is for up to 30CC engines. This is in the Walbro description of this filter. The 125-528 is for up to 80CC engines. Can this filter fit into the tank opening?
Have you used the 125-527 on a 50CC engine? Greg |
RE: Clunk / filter question
I have used the Walbro 125-527 clunk filter with several 52 cc engines ( and still do) with no problems and others have used them with bigger engines with no problems either.
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RE: Clunk / filter question
ORIGINAL: OldRookie The Walbro 125-527 is for up to 30CC engines. This is in the Walbro description of this filter. The 125-528 is for up to 80CC engines. Can this filter fit into the tank opening? Have you used the 125-527 on a 50CC engine? Greg I'm assuming it's for a 30 to 125cc engine. Did you read where it's only good up to 80cc? |
RE: Clunk / filter question
I've used them on engines up to 105cc. RTK uses one on his 115. If it wouldn't work just peachy it would not be suggested. No worries. It fits into the opening of standard tanks just fine. It will pass as much gas as the line will, and there isn't an engine up to 150cc or slightly larger that needs anything larger than a medium sized fuel line.
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RE: Clunk / filter question
OK. Thks for the advice. I'll use the felt for the plane and leave ceramic filter for the fuel can then.
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RE: Clunk / filter question
mrbigg,
The description said up to 30CC for the smaller filter, and up to 80CC for the larger filter. I have no idea why they would put this limit on these filters. I'll go with PatRoy's recommendation seeing as the filter has been tried and proved out in engines much larger than the recommended size. Thanks PatRoy. Greg |
RE: Clunk / filter question
Could it be due to the size of the cap on the lawn or saw tools they are normally attached to? The filter has to fit into the hole so that may be the primary reason, but I really don't have a reason for the difference.
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