Pre-Purchase Boat Inspection Checklist
Looking at a used boat? Pick the type, then tick off each item on this boat pre-purchase inspection checklist. Mark anything that worries you, and save it or send it to Ethan.
Ethan, the owner and mechanic, answers the phone · Open 7 days a week
What kind of boat are you looking at?
Paperwork
- Title and registration match the hull ID number (HIN) on the transom
- HIN on the transom looks original, not ground off or altered
- No liens on the title (ask the seller, or check with the FL tax collector)
- Service records and receipts, especially for the engines
- Engine hours match the records and the boat’s wearWhy?
- Trailer title and registration, if a trailer is included
Hull and deck
- No stress or spider cracks around cleats, rails, hinges, and the transom
- No soft spots when you walk the deck and press on the floor
- Transom is solid, with no flex or soft areas around engine mounts
- No blisters, cracks, or fresh patches on the bottom
- No signs of hidden repairs, like mismatched gelcoat or paint
- Hatches, seals, and drains work and aren’t clogged
Engines
- Ask to see it started cold (warm engines hide starting problems)
- No heavy smoke after warm-up
- Strong, steady telltale stream on outboardsWhy?
- Engine oil isn’t milky or sludgy
- Lower unit or drive oil isn’t milky (water intrusion)Why?
- No heavy corrosion on the engine, wiring, or fittings
- Compression test on every cylinderEthan checks thisWhy?
- Engine computer read for fault codes and real hoursEthan checks this
Fuel and electrical
- No fuel smell in the bilge or engine compartment
- Fuel lines aren’t cracked, and the water-separating filter is cleanWhy?
- Battery age (3–5 years is typical) and clean, tight terminals
- All lights, horn, pumps, gauges, and electronics work
- Bilge pump runs, and the float switch turns it on
- Wiring is tidy, with no melted insulation or burnt smell
Steering, controls, and sea trial
- Steering turns smoothly lock to lockWhy?
- Shifts cleanly into forward and reverse, with no grinding
- Trim and tilt work through the full range
- Reaches the engine’s rated top RPM at wide-open throttle
- No overheating, alarms, or vibration during the run
- Check the bilge after the run for new water
Center console extras
- T-top or hardtop mounts are tight, with no cracks at the bases
- Livewell and washdown pumps work
- Leaning post, console, and seating are solidly mounted
- Engine bracket or jack plate has no cracks, and the bolts are tight
- Multiple outboards are rigged and sync properly
Book a pre-purchase inspection
Tell Ethan about the boat you’re looking at. Your checklist and any concerns you marked are sent along.
What Ethan checks
- Compression test on every cylinder
- Engine computer scan for fault codes and true hours
- Cooling, fuel, electrical, steering, and lower unit
- A sea trial, when the seller allows it
Want a mechanic to check it for you? We do pre-purchase boat inspections at the dock in Pompano Beach and across South Florida.
Buying a Used Boat
What is a pre-purchase boat inspection?
It’s a check of a used boat before you buy it, so you know what you’re getting. A mechanic’s pre-purchase inspection focuses on the engines and running systems. That covers compression, engine hours and fault history, cooling, fuel, steering, and electrical, often with a sea trial. You find out about expensive problems before you commit, and you get something concrete to negotiate with.
How much does a boat pre-purchase inspection cost?
It depends on the number and type of engines, the size of the boat, and whether you want a sea trial or oil analysis. A single outboard costs less to inspect than twin inboards. Call with the boat’s details and you’ll get a price before anyone drives out.
Do I still need a mechanic if I use this checklist?
It helps you weed out bad boats before you spend money, but some of the most expensive problems only show up with tools: low compression, stored fault codes, and the engine’s true hours. Ethan checks those on site.
What’s the difference between a marine survey and a pre-purchase engine inspection?
A marine surveyor looks at the whole boat and its value, and lenders or insurers often require one. A mechanic’s pre-purchase inspection goes deep on the engines and running systems. On bigger boats, buyers often get both.
Can you inspect a boat before I buy it?
Yes. We do pre-purchase inspections wherever the boat is, in Pompano Beach, Fort Lauderdale, and from Boca Raton to Islamorada. You get a straight answer on the engines before you commit.