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Old 06-15-2019, 08:30 AM
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Can someone please recommend a very good fuel Filter for a gas engine. I am using a DA 35 and had a issue with the gold Miracle filters. They seemed to be sucking in air and created air bubbles in the line. I can't believe two new ones were bad but when I disconnected them I had no more problems ??
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Old 06-15-2019, 09:10 AM
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I use an automotive filter in my fueler but nothing in the airplane. keeps it simple. there's differing views on this as I sure you will hear.
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Old 06-15-2019, 09:40 AM
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Originally Posted by FGNewbie View Post
I use an automotive filter in my fueler but nothing in the airplane. keeps it simple. there's differing views on this as I sure you will hear.
Yeap
I use a large Walbro felt clunk in my fuel can and one in my tank
The nice thing about a felt clunk is the hold a good bit of fuel in them even if they are uncovered for a good time
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Old 06-15-2019, 09:53 AM
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No filter for me either. I’d you really have to have one the Secraft filter seems to work ok. If you are really serious about a filter get the Intairco CMB super filter that the turbine guys use. It’s big and expensive though.
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Old 06-15-2019, 09:59 AM
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3 line setup with felt clunk in the tank keeps things nice and simple.
Adding inline filters and fuel dots on a tee with a 2 line setup adds too many potential air leaks into the fuel supply line.
Pete
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Old 06-15-2019, 11:19 AM
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Originally Posted by Pilotpete View Post
3 line setup with felt clunk in the tank keeps things nice and simple.
Adding inline filters and fuel dots on a tee with a 2 line setup adds too many potential air leaks into the fuel supply line.
Pete

That. And use either a genuine Walbro filter clunk, Honda branded filter clunk (made by Walbro) or a Zama filter clunk. There are ones that look like Walbro filter clunks but have lower quality felt that can get loose and clog the tiny screen inside the carb.
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Old 06-15-2019, 04:21 PM
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Can someone please tell me Where can I get these Walbro filter clunks ??
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Old 06-15-2019, 04:48 PM
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For your 35cc engine, just Google Walbro 125-534. That's the 1/8" nipple, (2) 30 micron screens, "cut" felt to prevent loose felt fibers in carb, which had been a prior issue. They are on eBay, Amazon, online power equipment parts dealers, and likely at your neighborhood mower/chainsaw repair shop.

For engines over 80cc, you'd want the Walbro 125-532 with 3/16" nipple.
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Old 06-15-2019, 04:52 PM
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Most of the major hardware chains have the clunk filters.
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Old 06-15-2019, 08:45 PM
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My recommendation: DO as you wish. This is what I do.

Do not put a filter between the clunk and the carb nipple.

DO not use a "T" between the carburator and the fuel tank.

If you follow these two rules, the only other way air can get into the fuel line is if there is a hole in the fuel line, usually occurs near to the nipples of the clunk or the PSP cap or the carburetor. If not a PSP cap, then whatever connects the tanks internal fuel line to the outside of the fuel tank. A fitting of sorts. that is usually where a hole in the fuel line will occur. Ask me how I know this???
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Old 06-15-2019, 09:36 PM
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B & B Specialties also has the felt clunks
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Old 06-15-2019, 09:59 PM
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I run a straight dubro clunk. I filter my gas going into my mix can and filter into my fuel can. Interesting thread about felt clunks than can be very restrictive. I tested felt clunks from the same vendor and flow rate was dramatically different.
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Old 06-16-2019, 10:07 AM
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Yes, that too, avoid felt clunks. they may work well at first, but over time, they will become restrictive, same with ceramic filters.
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Old 06-16-2019, 10:14 AM
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Same here, good filter in the gas can and change it annually need it or not
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Old 06-16-2019, 10:19 AM
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Same here, good filter in the gas can and change it annually need it or not
For what it's worth, I use these filters when I put gas into the source can. As for an inline filter, I prefer to keep the source exceedingly clean and minimize potential points of failure in onboard system.

Search Amazon for "Mr Funnel" they make them in different sizes and were used exclusively in an operation where money was no object.





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