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Pre-Purchase Boat Inspections

Pre-purchase boat inspections from Marina del Rey to Newport Beach: engine compression and fault codes, drives, electrical, oil analysis and a sea trial.

  • 3 services
  • Labor $150/hr
  • Trip fee from $30
  • At your slip or in the shop
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  1. Pre-Purchase Boat Inspections for Buyers
    Rating:
    100%
    $150 /hr
    Quoted by boat size before booking
  2. Sea Trial Performance Testing & Verification
    Rating:
    100%
    $150 /hr
    Usually 1–2 hours
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Pre-Purchase Boat Inspections in Los Angeles and Orange County

We inspect used boats for buyers at the slip, dock or storage yard where the boat is kept, from Marina del Rey to Newport Beach. A marine service technician checks the engines, drives and onboard systems, so you know their condition before you sign.

What the work covers

Our pre-purchase boat inspection looks at the mechanical and electrical side of the boat:

  • Engines: a compression test, plus a scan for stored fault codes and engine hours on engines with a computer.
  • Drives: lower units, prop shafts and bellows, checked for leaks and wear.
  • Electrical: batteries, chargers, pumps and navigation lights.
  • Oil: oil sample analysis from the engine, transmission and generator, which can show wear metals, coolant or fuel in the oil.
  • On the water: sea trial performance testing, where we watch engine temperature, oil pressure and performance under load.

If we find repairs, we explain them and quote them, so you can weigh them before you buy. For a boat you already own, see boat maintenance and inspections.

When to book an inspection

  • You have made an offer on a used boat, or plan to
  • You want to confirm the engine hours in the listing
  • The seller says the engines were recently rebuilt or serviced
  • The boat has sat unused for a long time
  • You want to know which repairs are coming before you agree on a price

Questions about pre-purchase inspections

Is this the same as a marine survey?

No. A marine survey is done by an accredited marine surveyor, and a lender or insurer may require one. Our inspection is done by a marine service technician and covers only the engines, drives and systems listed above, so we recommend a survey as well.

Why test the oil if the engine runs well?

Oil analysis can point to internal wear, a coolant leak or fuel in the oil before those problems show up on a short sea trial.

Book a visit: submit a ticket with the boat you are looking at, where it is kept and when the sea trial is planned, or call (562) 542-7296.

Questions

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  1. User avatar

    #1353 Common question asks Dec 24, 2025

    Is oil analysis useful before buying a boat?

    1. User avatar

      Fryderyk Florczak answers Dec 24, 2025

      Yes, as one part of your checks. A sample from each engine and transmission can show wear or contamination the seller may not know about. It is a mechanic's test, not a marine survey; for the boat as a whole we recommend an accredited marine surveyor.

  2. User avatar

    #1351 Common question asks Dec 24, 2025

    What does oil analysis cost?

    1. User avatar

      Fryderyk Florczak answers Dec 24, 2025

      Sampling usually takes about an hour at $150 an hour, plus the lab's charge and the trip fee for work at your boat. You get a written estimate before we start.

  3. User avatar

    #1349 Common question asks Dec 24, 2025

    Is one sample enough?

    1. User avatar

      Fryderyk Florczak answers Dec 24, 2025

      One sample catches problems that are already well along. Sampling at every oil change builds a trend for each engine, and a change in that trend shows wear while it is still small.

  4. User avatar

    #1347 Common question asks Dec 24, 2025

    When do I get the results?

    1. User avatar

      Fryderyk Florczak answers Dec 24, 2025

      When the lab's report comes back, we send it to you and explain what it means and what, if anything, needs attention.

  5. User avatar

    #1345 Common question asks Dec 24, 2025

    Can you test the transmission and generator too?

    1. User avatar

      Fryderyk Florczak answers Dec 24, 2025

      Yes. We can sample transmission oil (gear oil or ATF) and generator crankcase oil along with the main engines. Each sample is labeled separately, so you get a report for each system.

  6. User avatar

    #1343 Common question asks Dec 24, 2025

    How do you take the sample?

    1. User avatar

      Fryderyk Florczak answers Dec 24, 2025

      With the engine, transmission or generator warm, we draw oil with a clean sampling pump or take it during an oil change, label it with the hours and oil type, and send it to an independent oil analysis lab.

  7. User avatar

    #1341 Common question asks Dec 24, 2025

    What does oil analysis tell me?

    1. User avatar

      Fryderyk Florczak answers Dec 24, 2025

      A lab tests a small oil sample for wear metals, dirt, fuel, water and coolant. It can warn of problems such as bearing wear, a leaking oil cooler or seawater in a transmission before they cause a breakdown.

  8. User avatar

    #1339 Common question asks Dec 24, 2025

    Is sea trial verification useful when buying or selling a boat?

    1. User avatar

      Fryderyk Florczak answers Dec 24, 2025

      Yes. A mechanical sea trial shows how the engines and systems perform under load, which is useful to a buyer or a seller. It is not a marine survey: lenders and insurers usually require a survey by an accredited marine surveyor, and we can work alongside the buyer's surveyor.

  9. User avatar

    #1337 Common question asks Dec 24, 2025

    Do I receive a report after the sea trial?

    1. User avatar

      Fryderyk Florczak answers Dec 24, 2025

      Yes. You get a written report with the readings we took and any adjustments or repairs we recommend.

  10. User avatar

    #1335 Common question asks Dec 24, 2025

    Can a sea trial help diagnose ongoing performance problems?

    1. User avatar

      Fryderyk Florczak answers Dec 24, 2025

      Yes. Sea trials often reveal problems such as fuel starvation, overheating under load, misalignment or electrical faults that cannot be fully diagnosed at the dock.

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