It ran perfectly in October. It's dead in March. Same story every spring — and it almost always ends one of five ways. Here's the honest diagnostic order, and the fast way back to the water.
Here's the conclusion most owners spend a frustrated weekend reaching: roughly half of all spring no-starts are the battery, and most of the rest are fuel that aged out over the winter. Three idle months of parasitic drain and Gulf humidity quietly kill PWC batteries; ethanol pump gas starts degrading in weeks. The machine that "ran perfectly in October" didn't break — it sat, and sitting is the disease.
The good news inside that diagnosis: the common causes are the cheap ones, they're fixable inside a week, and the whole category is preventable next winter for less than this spring's visit costs. The five causes below run in the exact order worth checking — and the order matters, because cranking away at cause three creates cause four.
What NOT to do: don't crank it endlessly (see cause four), don't spray starting fluid into a marine intake, and don't tow it to the lake "to see if it'll fire on the hose there." Ten minutes of restraint saves real money.
And the honest prevention note: nearly every machine on this page skipped winterization. The service that prevents this page costs less than the average visit that results from it. We'll say that gently, once, and then just fix your machine.
The exact sequence our marine bay runs on every no-start — cheapest causes first, evidence before parts, every time.
Not a voltage glance — a load test. Twelve volts at rest means nothing; cranking amps decide, and sulfated batteries fail here immediately.
D.E.S.S. key read, lanyard post inspected, kill circuit verified — the two-minute check that resolves the "dead machine" that isn't.
Age, smell, and pressure tell the winter's story. Fuel that sat since October gets treated as a suspect, not a bystander.
Plugs read (flooding evidence lives here), spark verified, and compression checked before any deeper conclusion.
The stubborn minority goes to BUDS or the platform's suite — stored faults, sensor data, and the answer with evidence attached.
Bring it in (or ask about pickup for dead machines — it's a thing we do every spring). The revival runs a fixed order: battery tested and replaced if sulfated, security and kill circuit verified, fuel assessed and the system cleaned to whatever depth the sitting time earned, plugs, a full watercraft program health check while it's open — and then the test tank, because "it started in the parking lot" is not "it's ready for Lake Conroe."
Most revivals are same-week. The exceptions are machines that sat for years or swallowed water — those get an honest assessment first, because sometimes the right answer is a bigger conversation, and you deserve it before the bill, not after.
Planning the season it wakes up into? Our Houston water guide covers where the machine's about to spend its summer — and which launches are hardest on it.
Ninety percent of the time: battery. A single click is usually the starter relay dropping out from low voltage; rapid clicking is a battery on its knees. Load-test before buying anything — a battery can read 12 volts and still be dead under cranking load. The stubborn ten percent is relay, ground, or starter.
That's the classic signature. Months-old ethanol fuel loses volatility and gums the system; the engine spins happily and ignites nothing. Depending on how long it sat, the fix ranges from fresh fuel and plugs to a proper fuel-system cleaning. Stop cranking before you flood it — that just adds cause number four.
Usually not. A completely dark dash points at battery, main fuse, or a corroded main connector — cheap fixes in unglamorous places. On Sea-Doos, a failed D.E.S.S. key can also look like a dead machine. It's one of the fastest diagnostics we run.
Careful — with the truck engine OFF only, and better yet, use a proper lithium jump pack. A running vehicle's charging system can spike sensitive PWC electronics and turn a battery problem into an ECU problem. The safest answer is a charged battery, not a jump.
Spring revivals are prioritized because we know exactly what the season feels like. Battery-and-fuel cases typically turn around inside the week; deeper diagnostics get you a written answer fast either way. Call before the first hot weekend and you'll beat the rush that starts on it.
Tell us what it does — click, crank, fire-and-die, or nothing at all. We'll take it from dead to dockside, and tell you honestly what it needs on the way.
(713) 555-0182