Pre-Purchase Yacht Survey Hong Kong: Survey Day Checklist

A pre-purchase survey on a used yacht in Hong Kong usually runs in three stages: (1) haul-out, to inspect the hull, propellers, rudders and underwater fittings; (2) an on-board inspection, including a cold start and engine oil samples; (3) a sea trial, to check wide-open-throttle revs, temperatures and handling. The report then ranks the findings as immediate, short-term or monitor-only, and you use that ranking to negotiate a lower price or ask the seller to repair. Allow a full day: Hong Kong surveyor MSES says a 36 ft yacht takes about 8 hours, including haul-out and a short sea trial.

Survey fees and the full five-step buying process (survey, ownership search, transfer, berth, insurance) are covered in the complete guide to buying a second-hand yacht in Hong Kong, so we won't repeat them. This article goes one level deeper: what you will see standing at the boat on survey day, what the surveyor looks at, how to read the report, and how to negotiate once problems turn up.

This timing is indicative only. The real schedule depends on boat size, yard availability and weather, and there is no fixed duration for each stage. If it rains all day or the sea is rough, the sea trial may have to move, so leave some slack and don't line the survey up tightly against your transfer or insurance deadlines.

Half of survey-day efficiency comes down to preparation.

1. Make the survey and sea trial a condition of sale in the sale agreement. That gives you the right to renegotiate the price, ask the seller to repair, or walk away if the results aren't what you expected. Without that clause you find the problems and have no leverage.
2. Agree who pays for what. The surveyor's fee is normally the buyer's. Haul-out, yard berth and lifting costs need to be agreed with the seller and broker in advance, not argued about on the day. One US survey firm says the buyer is responsible for the survey fee and hauling charges (source); in Hong Kong, ask the broker what the practice is.
3. Ask the seller for documents. Service records, oil-change records, the date and report of the last haul-out, and invoices for refits or repairs. No records doesn't mean there's a problem, but it means you rely more heavily on today's survey.

When choosing a surveyor, ask whether they have surveyed your type of boat (IPS drives or conventional shafts; GRP or aluminium) and ask to see a sample report. For survey fees and how to pick a firm, see the buying guide above.

A yacht can look perfect above the waterline while the real history is underneath. That's why a survey almost always includes a haul-out: the boat is lifted clear of the water by crane or slipway and set on stands.

What the surveyor checks once the boat is out:

• Hull condition and moisture. A moisture meter is run along the hull; fibreglass (GRP) hulls are most vulnerable to water ingress and osmosis blisters. Water temperature is linked to osmosis: paint maker International Yachtpaint says a boat that has been used for years in cold water without trouble can show osmosis symptoms a few years after moving to a region with much warmer water (source). That is about the temperature difference after a move, not a claim that Hong Kong hulls will blister, so for a used boat find out which waters it has been used in. For how moisture readings and tap tests are done, see marineinspection.app.
• Tap test (sounding). A small hammer is tapped along the hull. A sharp, ringing sound is normal; a dull sound may mean delamination or trapped water. It's old-fashioned but effective.
• Propellers and shafts. Bent, chipped or worn blades; signs of leakage at the shaft seal; looseness in the rudder blade and stock. On pod drives such as IPS, the surveyor looks at the pod housing, the rubber bellows and the gear leg oil level.
• Sacrificial anodes. These zinc blocks corrode in place of the boat's own metal. If they are nearly eaten away, the corrosion protection is used up, so ask when they were last changed and whether underwater metal parts have suffered galvanic corrosion.
• Seacocks (through-hull valves). Does each valve turn freely? Any corrosion? Are the hoses perished? A failed seacock is, in the worst case, how a boat sinks.
• Antifouling. How long ago was it applied, is it peeling, and what should you budget for the next coat?

Buyer tip: go down and look yourself. Stand beside the surveyor at each problem spot and hear whether they call it "surface" or "serious". Take photos, because you will use them when negotiating.

Once the boat is back in the water (or before the haul-out, depending on the yard schedule), the surveyor goes aboard for mechanical and electrical checks.

Cold start

Many surveyors ask to start the engines before they have warmed up, because a cold engine shows problems most readily: slow starting, white or blue smoke, odd noises, warning lights that stay on. If the seller "warmed it up for you" the evening before, insist on a cold start next time, especially on an older boat.

Oil analysis

This is the most valuable item on survey day, and the one most buyers don't think to ask for: samples of engine oil and gearbox oil (and hydraulic oil where relevant) sent to a lab.

• How it works. The surveyor draws samples while the oil is still warm, seals them and posts them to a lab. Results take a few days (a US survey firm says about 3 days, source). Which lab is used depends on the survey firm. MSES also states that oil analysis is an extra charge (source).
• What it can show. Metal content in the oil (iron, copper, aluminium, which suggest which parts are wearing), coolant getting into the oil (a sign of a head gasket, oil cooler or pump problem), fuel dilution (injector or combustion problems) and how degraded the oil is.
• Limits. An oil sample is a blood test. It doesn't replace a compression test, an endoscope inspection or an engine strip-down. Surveyors generally do non-invasive checks only. If the oil results look abnormal, the next step is usually a deeper inspection by an engine mechanic.
• Cost. Ask the survey firm what they charge. Compared with an engine rebuild it is normally a small price for insurance.

How to read engine hours

Engine hours only mean something alongside the boat's age (see our engine hours guide). The three boats below show very different average hours per year. But hour meters can be replaced or reset, so check the number against service records and oil results rather than trusting it alone.

Electrics, pumps and safety gear

• Batteries and charging system, shore power, generator
• Automatic float switch on the bilge pump
• Air conditioning, fridge, water pumps, water heater
• Radar, GPS, VHF, autopilot
• Fire extinguishers, lifejackets and flares: check expiry dates

The sea trial is usually the main event of the day, normally run out of the typhoon shelter into more open water. A US survey firm suggests at least an hour in open water for a sea trial, longer for bigger boats (source). MSES's survey package includes a "short sea trial" (source), so when you book, ask how long the trial will run.

Typical sea trial sequence:

1. Warm the engines to normal temperature. Listen for odd noises and watch for warning lights.
2. Accelerate in steps: idle, low speed, cruising speed, then wide-open throttle (WOT). WOT revs should be close to the engine maker's rated figure. The usual industry practice is to compare measured revs against the manufacturer's rating; a large gap points to a propeller, fouling or engine problem. The acceptable range varies by engine, so check the Volvo Penta, Caterpillar or other manual and confirm with the surveyor.
3. Log the numbers at intervals: revs, coolant temperature, oil pressure, boost pressure, exhaust smoke colour, boat speed.
4. Handling: sharp turns, crash stops, reverse, behaviour when docking in a crosswind; any play in the steering.
5. Autopilot, radar, sounder: test them underway, not just switched on at the berth.
6. Vibration and noise: take turns at the helm, go aft, and go into the engine room if it's safe, to feel for unusual vibration.
7. Post-trial inspection: back at the berth, open the engine room again and look for leaks, oil and burning smells.

What buyers should do on the trial: take the helm yourself for a while, ask the surveyor "what feels wrong to you?", and watch how the seller or broker reacts. Don't relax just because the crew is being very helpful.

Print this and tick items off on survey day. Red flags are prompts only; the final judgement rests with the surveyor and the report.

When the report comes depends on the survey firm, so ask when you book. Don't just read it from page one. Go in this order:

1. Summary and recommendations first. Most reports grade findings, for example "immediate action", "short-term action" and "monitor / maintain".
2. Then the limitations and exclusions. The report will say what could not be inspected (for example, linings not removed, or an engine room too cramped to reach). Know your blind spots.
3. Check whether there's a valuation. If you plan to finance the boat, banks or finance companies may need a valuation report (see yacht financing in Hong Kong).
4. Put every finding in a spreadsheet: item, severity, estimated repair cost, who pays. This is the basis of your negotiation.

Remember: a survey report is not a pass or fail. It is a description of condition. A used boat will almost always have findings. What matters is which are normal ageing, which are hidden risks, and how much it costs to fix them.

Here are three Sun Yachts listings (asking prices and specs as of 27 Oct 2026) to show how survey priorities change with age and size. This is general survey thinking based on the specs only; it does not suggest any of these boats has a problem.

2006 Fairline Squadron 58 (HK$2,580,000): age is the main issue. On a boat of about 20 years the surveyor will worry most about osmosis and delamination, water in the deck core, fuel tank and fuel line ageing, wiring and the anode system. At 1360 hours, about 68 a year, it has seen active use, so whether engine and gearbox seals and hoses have aged needs oil analysis and the sea trial to confirm. View the boat; more on the model in the Fairline Squadron buying guide.

2015 Prestige 450 (HK$3,980,000): the IPS drive is the focus. Relatively young, 330 hours, so the least obvious "problems". Surveyors usually concentrate on the IPS pods: seals, gear leg oil condition, corrosion protection on the pod housing and the propellers. This kind of drive must be examined properly at haul-out, because underwater problems are the hardest to deduce from the surface. View the boat.

2007 Vitech 68 (HK$3,280,000): big boat, high hours, Taiwan-built. At 17xx hours, with two large Caterpillar c15 engines, oil analysis and a compression test are worth the most. A hull this size also means haul-out costs and yard choice need to be arranged early. The listing says the owner "looked after it very well, with regular waxing" and that "all wear items were replaced, new radar, very well maintained"; those are the seller's descriptions, and you still need service records and survey results to verify them. For what to expect from Taiwan-built yachts, see the Taiwan-built yachts guide. View the boat.

To see more boats by budget: HK$1M to 3M and HK$3M to 6M, or the Fairline brand page. For overall price levels, see the yacht price guide.

The survey's real value is that it lets you negotiate on facts rather than feel.

Step 1: sort the issues into three categories.

Step 2: get quotes, don't guess. Ask a yard or technician to quote for each item and negotiate with real numbers. A seller can hardly argue with a yard quotation.

Step 3: choose how to negotiate.

• Straight price reduction. Simplest. For example, if the repair quotes for A and B items add up to X, use X as your starting point for a price reduction.
• Seller repairs. Sometimes cheaper for the seller, but you must be sure of the quality. Agree with the surveyor beforehand whether they can re-inspect after the work, with the cost charged separately.
• Escrow. A UK broker's guide says the deposit is held by the broker as stakeholder in a client account (source). How to hold back part of the balance until repairs are done is a question for a lawyer in Hong Kong.
• Walk away. If the survey finds a major risk (category C), you can cancel under the survey clause in the sale agreement.

Step 4: don't over-squeeze. An older boat will naturally have ageing items, and normal wear shouldn't all go into the price cut. A fair approach is to focus on items that weren't disclosed before the survey and that will cost you extra. The seller also needs to be able to sell, and being too harsh can end the talks.

After the survey, the next steps (ownership search and transfer) are covered in steps 2 and 3 of the buying guide. For what you will spend each year after buying, see yacht ownership costs in Hong Kong.