How to Drain Water From Fuel Water Separator Like a Pro

If your engine is starting to act a bit sluggish or stuttering under load, you probably need to know how to drain water from fuel water separator before it causes a real headache. Most modern diesel engines—and even some gas ones in boats—have this handy little device designed to keep moisture from reaching your expensive fuel injectors. It's one of those maintenance tasks that sounds intimidating if you've never done it, but honestly, it's about as simple as turning a faucet. ...

February 22, 2026 · 7 min · Wilma Roberson