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[May 14, 2022]


This is my first annual with the Fly EFII fuel pump and filter. My previous filter was serviceable, but this one is not - I believe it is means to be changed every year. Fly EFII sells it as their FF-2 90 micron pre-filter, and it is $45 on their site. I was pretty certain FLY EFII didn't manufacture the filter, so I went looking for who did and if I could buy it locally. It looks like the original manufacturer/PN is Baldwin BF7519, designed as a high efficient stainless steel filter. Digging further I could see it was also available at NAPA with the party number 3269.


All of the pictures of this filter looked odd - I wasn't able to ascertain exactly how Fly EFII converted from what appears to be a compression fitting. Naturally I needed to look at my filter and see what was the deal was how they converted from the output of the filter to an AN6 nipple.


Wow, I was somewhat shocked at what I saw - they used the compression fitting with the rubber sleeve. More concerning was small bits of rubber had come loose where the threaded fitting clearly dug into the rubber.


To not stop there, I further dissected the fitting to see how it was really assembled. I was somewhat in shock, this doesn't look very aircraft quality to me.


Even more scary was when the assembly was taken apart, small bits of rubber fell into the filter exit.

Even more concerning was I only found once reference to the filter micron rating - 150 (source https://www.michelecaroli.com/info.php?oempartnumber=BF7519&donaldson=P550446. Too many red flags here, I am probably going to install an AndAir serviceable 75 micron FX375-MK filter.

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Last Modified: August 28, 2022