Gusher

A shot that runs far too fast — pouring in under 15 seconds at a 1:2 ratio. Often comes with no crema, watery flow, and a hollow flavour.

Why it matters — Indicates a major puck integrity problem. Usually grind too coarse, dose too low, or severely channelled puck (often from a bad tamp or an unmaintained basket).

Good to know

• A bottomless portafilter will show you immediately whether the gusher is from grind, dose, or channelling.
• Don't fix a gusher only by grinding finer — check the dose and puck prep first; otherwise you'll keep chasing the problem.