You see lots of Racor FG500 fuel-water separators kicking around the waterfront, both on new boats (mostly protecting gensets) and on older ones like my Betty Jane, where the trusty little device helps stop water and other contaminants from getting into the main engine.
The FG500’s not a maintenance-free product, however. Just a few weeks ago I observed the faint leaking of diesel fuel down the side of the canister. At first I thought the topside lid had somehow loosened and was spilling fuel ever so slightly but closer inspection revealed the source was somewhere near the metal ring that holds the glass bowl in place. A teardown ensued, followed by a rebuild. Click here for the step-by-step. ➤