Buying a Used Boat in Puget Sound: What Every Buyer Needs to Know

The used boat market in Puget Sound

Puget Sound has one of the deepest used boat markets in the country. Hundreds of boats turn over every spring across Tacoma, Gig Harbor, Seattle, and the islands — which is good news for selection and bad news for due diligence.

Here's the problem: a boat that lived its whole life at Foss Harbor, got winterized every October, and had its impeller changed on schedule is a fundamentally different machine than the same model that ran hard in the San Juans all summer and got parked wet in October. Both will be listed for the same price on Craigslist. The seller of the second one isn't necessarily lying — they just don't know what they don't know. That's your problem now, not theirs.

The 7 things buyers consistently miss

Exhaust manifolds and risers. On any inboard or sterndrive over seven years old, these are the single most expensive failure point in the engine room. They corrode from the inside out. Owners almost never replace them proactively because they're out of sight. When they fail, they fail into the engine. Budget $1,400–$2,500 each, and most boats have two.

Lower unit seal condition. Pull the drain plug on the lower unit. If the gear oil comes out milky, a seal has failed and water has been in there. That's a $1,500–$3,000 repair before you've left the dock.

Transom and stringer integrity. Tap test the transom on any outboard boat. A wet, delaminated transom is $8,000–$15,000 to repair correctly — more than the boat is worth in many cases. This is the one that kills deals.

Fuel tank condition. Aluminum tanks pit from the outside in. You can't see it happening and the seller probably doesn't know it's happening. A leaking tank on an inboard cruiser runs $3,000–$6,000 to replace, plus the labor of getting to it.

Wiring. Marine wiring corrodes. Green crusty terminals, wire nuts used in a marine application, splices wrapped in electrical tape — these are a fire waiting to happen. A boat with bad wiring isn't a project, it's a liability.

Compression. A seller's word that "it ran great last fall" is not the same as a compression test. Pull the plugs. Check the numbers. An engine with one low cylinder is a negotiating tool. An engine with two low cylinders is a rebuild.

Hours versus condition. A 200-hour boat that sat for ten years is almost always worse than a 1,200-hour boat that ran every weekend and got maintained. Hours tell you how much the engine ran. They don't tell you what happened between runs.

Why a pre-purchase inspection pays for itself

We've inspected boats where the buyer was about to write a check for $42,000 on a cruiser with a cracked manifold, two dead batteries, a soft transom corner, and a fuel tank weeping at the sender. The inspection cost $399. The repairs would have run north of $20,000. The buyer walked.

More often, the inspection finds three or four smaller items — a worn impeller, a marginal anode, a cracked exhaust hose — that become negotiating leverage. Buyers routinely knock $2,000 to $5,000 off the asking price using the inspection report. The inspection pays for itself before you've shaken hands.

The one scenario where an inspection doesn't make sense is if you're prepared to buy the boat regardless of what we find. In that case, just buy the boat. But if there's a price above which you'd walk away, you need to know what you're buying first.

Survey vs. inspection: which one do you need

A marine survey is a formal document for insurance and financing. It's exhaustive, runs $20–$25 per foot, and takes a full day. You need one if you're putting a lender or insurer on the title.

A pre-purchase inspection is faster, cheaper, and focused on the question you actually need answered before you commit: should I buy this boat, and if so, at what price? Engine, drivetrain, electrical, fuel system, structural spot-checks, sea trial if the boat's in the water. Slip Side Marine's inspection is $299–$399. Most buyers who go to closing find that the inspection findings pay for the survey too.

Slip Side Marine pre-purchase inspection: $299–$399

Outboards under 24 feet: $299. Inboards, sterndrives, and cruisers up to 32 feet: $399.

We'll meet you and the seller at the boat anywhere in Pierce County — Foss Harbor, Tyee, Narrows, Breakwater, Ole & Charlie's in Gig Harbor, private docks, dry storage yards. We test cold-start and at operating temperature. We pull plugs for compression where accessible. We check every system, open every hatch, tap the transom and stringers, inspect the fuel system end-to-end, and document everything with photos.

You don't move the boat. You don't need to arrange anything except access. We handle the rest.

Full photo report within 2 hours

Not three days later when you've already lost the boat to another buyer. Within two hours of finishing the inspection, you get a complete photo report by email — every finding documented, every system photographed, plain-language captions on everything we touched.

The report tells you exactly what you're buying, what it's going to cost in the first twelve months, and where the negotiation room is. That's the entire point of hiring us.