Hi all you "Wingers",
Was having some fuel related issues with what might be sediment or crap in the fuel tank causing idle circuit issues after winter lay up....
I was going to just replace the fuel filter and the fuel lines (because they are about 10 years old now.... see post "Project Resurrection From The Back Of The Garage) and decided to upgrade my fuel filter to one with a better filter and smaller micron pass through number... I removed the clear plastic one that I had been using all these past years and discarded the bracket and used some SAE J30R7/30R14T12 barrier fuel injection hose and managed to fit the slightly larger filter into the limited space under the fuel tank and over the engine/transmission....
New filter https://shop.donaldson.com/store/en-us/ ... 0012/20019 has a 40 micron rating and has a steel case with a 5/16' inlet/outlet.... I shortened up the outlet side hose so it is closer to the fuel pump which keeps it in a position (because it is bigger than the OEM one) and out of interference with things in it's "occupied space"... I use this same filter inline on the outboard engine on my boat and haven't had any more issues with any sediment or fuel related "crap" getting into the carbs anymore on that engine, so thought it a good upgrade for the Wing...
Hi N2PPN, doesn`t yout filter upgrade bounce like hell???
It is hard to get matching spareparts in germany, so i order mostly at csmnl.com.
I just replaced the original factory filter from 1981 and found no differences in performance.
But once amonth i add somme carb Tune Up to the gastank. STP, LiquiMoly or equivalent. That works fine.
Ride on, have fun. Regards UliJ from Germany
Just did a "newer" filter upgrade.... managed to get an 8 micron Motorcraft FG-1114 filter to fit between the tank and the carb linkage.... I made a 90 degree bracket out of some stainless, attached it to the side of the filter with the bent side towards the outlet, drilled and installed a 6MM screw to it protruding in direction of outlet (so it can attach the filter to the hole in the tab of the tank that the OEM filter used) and ran some new 5/16' fuel line from tank petcock (you'll have to play with the length as the inlet to the filter is very long and new fuel line will have to be bent 90 degrees without kinking it when attaching to the petcock) .... Hopefully will keep the sediment issues from the damn E10/E15 we get here in NY under control.... I'll try to get some pictures of it since I wasn't really sure it would fit as I was installing it and didn't want to document a failure... the only thing I was leery about was if there would be enough clearance for the throttle linkage to the #2/4 carbs... the filter is almost 3" in diameter!
once I managed to get the bracket set right it gave me almost 0.5" of clearance from the linkage and not that it's actually attached to the tank, I won't have to worry about vibrations as I did with the "free floating" Donaldson filter I was using previously.
Only downside is that the timing mark cover is partially covered by the new filter, but still can be removed and used for valve adjustments without removing the new fuel filter....
I was surprised that there were not a whole lot of 8 micron gas/flex fuel filters out there... most seem to be 15 micron or bigger... and the flow rate is more than enough for the GW...
Good to know what works, what has always worried me is bits from the fuel pump diaphragm clogging up the little float needle screens, don't mind replacing a fuel pump but why didn't they put a filter on the exit..I plan to put a compact disc with metal screen filter between the pump and carbs
