Where do most of you put the inline fuel filter? do you let it play freely with the tubing on its way to the high end needle tit or do you secure it somehow? My tank connections (fuel and vent) are at the firewall interface and there is no room to place the filter in the tank compartment. Suggestions? Thanks ahead of time...
Right up by the carb. if you disconnect the fuel line to fill, you don't want to fuel back-wash through the filter and possibly leave residue on the downside of the filter. So you disconnect at the tank side of the filter and fuel.
Some will scream and wail not to use an inline filter and others will do the same to use it. I use it to preclude that stuff that goes through the engine, into the tank via the muffler pressure and then back to the carb., uh for me the in-line filter. Guess it's your choice. I have used a filter since my competition CL stunt days back in the '50-'60s. Guess I always will.
Horrace Cain.
I don't. In my experience, anything that restricts the fuel or air flow is detrimental to the power output and user-friendliness of the engine. I filter the fuel twice from the supply container: first, with a klunk filter, then an inline filter like you describe. Also, any extra connections, like a filter, are a place for fuel to leak out and air to leak in. Dr.1 Driver "There's a Hun in the sun!"
Great Advise Thanks... I'll put the in-line filter as close to the carb as possible. I'll disconnect the tank side of the filter for fueling ops. Sound ok?
I triple filter my fuel on its way to the fuel tank. No need to carry the extra weight and failure points of a filter that should remain on the ground in the first place.
Ed Cregger
What I will probably do is have a filter/strainer in the fuel bottle itself (klunk), in line after the pump ( in the fueling line) and finally in the tank itself (another klunk)... Sound about right? Thanks
If you use a fueling valve you don't have to disconnect anything, eliminating wear and tear on the tubing.
Cheers, Fred McClellan the dash plumber at mindspring dot com
Can you provide a link of a fueling valve product? Thanks
But this will break unexpectedly and cause air leaks that are a pita to find.
After a long period of a fine mesh filter in the fuel pickup line, I now have that same filter in the tank fill line, so all fuel that enters the tank is absolutely clean. Occasionally, I rinse the tank with a siringe on the fuel pick-up line. I have since I started this method not had needle settings changes because of debris in the filter or fuel needle assy. The change was dictated because small 1/12 combat engines are fussy about their fuel supply, and even the smallest lint particles will disturb the precious tune.
True, but it takes a Figure 9 maneuver to break it.
I did manage to wear one out, though. Spring got weak and wouldn't seal, which is I suppose why DuBro sell rebuild kits for their valves. Cheers, Fred McClellan the dash plumber at mindspring dot com
Cheers, Fred McClellan the dash plumber at mindspring dot com
I use a felt chain saw filter in my gallon jug and a large Dubro filter in the line to the carb. I have never had a fuel metering problem. Dumb thumbs and bad luck are another story.
Brian
I don't use 'em.
I do, however, use one of the DuBro Sintered Bronze Filter Clunks at the end of my fuel jug pickup line, and always use one as my tank clunk. They NEVER clog up nor do they interfere with engine operation.
Same here, when I have a few on hand.
Ed Cregger
Brian, The fine mesh in the fuel line to the carb slowly got clogged with a felt-like lint mat and needed regular cleaning, because in time it prevented adequate fuel flow. This flow resistance increase is a quite steep curve, and announces itself by the need to open up the main needle. That means at least one lean flight. The lint probably is introduced when wiping the fuel line ends before refueling.
The past year I used the same filter in the fill line, and this keeps al debris out of the fuel tank, so an engine fuel line filter is no longer needed. Minor needle tweaking is only needed in case of fuel mix changes, and extremely moist weather conditions. To clean the filter, I inject some fuel in the tank, and then pull it back with a 2 Oz syringe. All debris that was in the filter, now is in the syringe and can be disposed of. I have yet to find an easier and more reliable filtering method.
PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.