Originally Posted by biffer
i was a racor or separ man until i was shown one that yamaha do, it's all plastic body and paper filter makes it a fraction of the price of the others, another good thing is that it has an orange ring in the bowl that floats in water and not petrol, you can see it in a glance
Biffer; are you talking about the under-cowl filter? Or a canister, remote-mounted one. If the latter, I've never seen one.
I use a Racor on my boat, in addition to the standard Yam under-cowl seaparator/filter (little plastic job with a water detection circuit going to the engine electronics.) If you are mounting in an enclosed space, you should use the metal bowl on the Racor (at least in the US; USCG regs prevent using the see-thru plastic bowl in enclosed spaces.)
Yamaha makes (or sells; it's probably a rebranded commercial unit) a canister filter; no bowl just a blue-painted steel can, like a spin-on oil filter, rated at 10 microns, and somewhere around 90 GPH, as I recall. I'm sure other manufacturers do similarly.
Racor does make diesel filter canisters as well (in response to the Delphi comments.)
As to the corrosion issue, the canister should be changed yearly anyway. I find that giving the canister a coat of automotive wax before installation helps it last the season with minimal rusting.