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Old 03-20-2017, 09:16 AM
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fuel filters

How often should you replace your fuel fuel filters on your gas 50cc planes, any suggestions would greatly be appreciated.
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Old 03-20-2017, 09:32 AM
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Never

Clean the tank and filter your fill line on your gas can with an automotive fuel filter

Inline filters are a great source of air leaks IMO
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Old 03-20-2017, 09:37 AM
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Quote:
Originally Posted by BarracudaHockey View Post
Never

Clean the tank and filter your fill line on your gas can with an automotive fuel filter

Inline filters are a great source of air leaks IMO
This is true, that inline filters can be a source of airleaks. But even an auto filter on your can will let some sediment pass, your vent line will suck up debris etc. So it is a balancing act.

I use the Dubro Large silver inline filters. I found they don't tend to leak air. I clean them once a year when I do my spring maintenance on the planes.
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Old 03-20-2017, 10:07 AM
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If you're dead-set on a filter on the plane, you can install one on your fill line. (Fuel dot line)
This way an air leak, if it occurs isn't an issue. On the carb line a leak can deal you fits.
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Old 03-20-2017, 10:31 AM
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A felt filter clunk is all the filter needed for a gas engine, as long as you run a 3 line setup. But then 2 line setups with a T and fuel dot are asking for air leaks. I replace the felt clunks every couple of seasons when replacing the clunk line in the tank. The felt clunks provide a large filtering area, so they don't restrict the fuel flow, and as long as they are wet with fuel, they won't allow air to be drawn into the fuel system.
Pete
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Old 03-20-2017, 10:32 AM
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I have use the ceramic clunk filters with great success. Of course, these only work in a 3 line tank set up (not a T into the carb line). Available here:http://www.quickieparts.com/accessor...fuel-line.html

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Old 03-20-2017, 10:44 AM
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I personally love the Hangar 9 in-line filter, I use them in all my planes (on the fill line only) and even in my gas tank.

http://www.horizonhobby.com/product/...s--glow-han143
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Old 03-20-2017, 11:20 AM
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I also use the Hanger 9 filters, they have a very fine screen, I first started using them in my turbines many years ago, never an air leak ( you know how critical air bubbles are in a turbine fuel system ) I now use them in all my gasers, no leaks, going on three years flying gas.

I safety wire all of them and all of the ends of the fuel lines, maybe that's why I never experienced an air leak, I use two lines with a T for the fuel lines installs.
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Old 03-20-2017, 11:24 AM
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If you think about it as a filter becomes dirty it will compromise fuel flow. My filters are in the fueler, not the airplane.
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Old 03-20-2017, 11:36 AM
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Very true, when using a filter you have to understand that it has to be inspected and clean every so many months, there is no way out of it, if you don't it defeats its purpose.

A few days ago I did the spring checks on all of my flying airplanes and all of the filters were opened and cleaned with alcohol, non of them had any thing that was preventing the fuel from flowing through.

My nitro, Kero and gas fuels are filtered three times before they go into the fuel tanks and the fuel is filtered twice before it gets to any of my engine.
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Old 03-21-2017, 06:16 PM
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Except for those of us that fuel them out of our Airplane cans - how many of you worry about filtering of fuel or fuel filters on our garden equipment?


Same sorts of fuel systems - same sorts of fuels - years without problems.


Sometimes, we create infant failure of components by over servicing.


I use Felt or ceramic clunks (depending on what is available at the time) in my tanks, 3 line systems with a small "o'ring" of fuel hose to act as a clamp and I use a small sized automotive filter on the outlet of my fuel can - I have never had a problem with fuel blockages (plenty of brain blockages to the thumbs though). I also use the same fuel can for my planes as I do for my garden equipment (which is all Stihl or Echo brands so it can handle the mixes we use) - which keeps my fuel very fresh.
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Old 03-21-2017, 07:04 PM
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See, you have a way to do things and it works.

That is what one is supposed to develop to prevent fueled problems.
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Old 03-21-2017, 07:09 PM
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Only filter I use are felt clunks.
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Old 03-21-2017, 07:46 PM
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I have a felt clunk in my fuel can and one in my tank and that is all it takes
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Old 03-21-2017, 08:28 PM
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Good video here -
Fuel System Setup (7 min 33 sec)
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