A Fass system on a 21hp engine would be a fantastic misallocation of effort and funds.I replaced both filters (and the fuel pump) not that long ago as part of my preventative maintenance.
I have to admit that I really don't like the set up in this tractor for fuel filtering and pumping. I would like to replace both filters with a single spin on one and the fuel pump with something more robust like a Fass pump. I haven't found a Fass system small enough for my BX yet, though, so I'm not sure if they make one that small or not.
It simply doesn’t take a whole lot of fuel to make 21hp.
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