A Smart Buyer's Guide to Purchasing a Used Boat Engine
Whether you're refurbishing an old boat or looking to upgrade your current setup without breaking the bank, buying a used boat engine can be a practical and cost-effective choice. However, it requires careful inspection, research, and a bit of mechanical know-how to ensure you're making a solid investment.
Here’s what you need to know before you buy a used boat motor.
Why Buy a Used Boat Engine?
New outboard and inboard engines can cost thousands of dollars—sometimes more than the boat itself. A well-maintained used engine, on the other hand, can deliver years of reliable performance at a fraction of the price.
Benefits include:
- Substantial cost savings
- Access to discontinued models compatible with older boats
- Quicker return on investment for occasional boaters
Where to Buy a Used Boat Engine
There are multiple avenues to find used boat motors, both online and locally. Trusted sources include:
- Boat Salvage Yards: Good for in-person inspections and potential discounts on bundled parts
- Marine Dealerships: Often offer reconditioned engines with limited warranties
- Online Marketplaces: Sites like Craigslist, eBay Motors, and Facebook Marketplace feature private listings
- Boat Shows and Auctions: Great for networking and finding specialty engines
If buying online, be sure to ask detailed questions and request high-resolution photos or even a video of the engine running.
Key Considerations When Shopping
1. Engine Type and Size
First, determine whether you need an inboard, outboard, or stern drive engine. Make sure the horsepower and size are appropriate for your boat’s specifications to avoid performance or safety issues.
2. Hours of Use
Unlike car engines, boat engines are measured in hours rather than miles. Look for engines with fewer than 500 hours for optimal longevity. Be cautious of unusually low hours on older models—it could signal long periods of inactivity or a reset hour meter.
3. Compression Test
Before buying, request or perform a compression test. This test checks the health of the engine’s cylinders and reveals signs of internal wear. Balanced compression across all cylinders is crucial for efficient operation.
4. Maintenance Records
Ask for service history, receipts, and details about storage conditions. Engines that were winterized properly and maintained regularly are more likely to perform well.
5. Physical Condition
Inspect the engine thoroughly:
- Look for corrosion, rust, or oil leaks
- Examine the propeller for damage
- Check the wiring, hoses, and clamps for cracking or fraying
Bring a marine mechanic if you’re unsure what to look for.
Pricing Guide
Used boat engine prices vary based on age, brand, type, and condition. Here’s a general ballpark:
- Small outboards (2–15 hp): $300–$1,200
- Mid-range outboards (25–90 hp): $1,200–$4,000
- Large outboards (100+ hp): $4,000–$10,000
- Inboard engines: $2,000–$10,000+
Engines with recent rebuilds, upgrades, or new components may command higher prices—but may also save you money in the long run.
Red Flags to Avoid
- No compression test available
- Engine stored improperly (e.g., left uncovered or exposed to weather)
- Significant corrosion, especially around the lower unit
- Seller unwilling to let you test-run the motor
- Missing serial numbers or model tags
If something feels off, walk away. There are always more engines on the market.
Final Thoughts
Buying a used boat engine can be a rewarding and financially savvy move if approached with caution. Do your homework, ask the right questions, and when possible, consult with a marine mechanic. With the right motor, your boat can get back on the water smoothly—and without sinking your budget.