Quick answer A new Mercury outboard costs more upfront but comes with a 3-year factory limited warranty (current promotions can extend total coverage; see current offers), current technology, and predictable maintenance for the first decade. A well-kept used Mercury saves you...
Quick answer
A new Mercury outboard costs more upfront but comes with a 3-year factory limited warranty (current promotions can extend total coverage; see current offers), current technology, and predictable maintenance for the first decade. A well-kept used Mercury saves you 40-50% on the purchase price but starts the warranty clock at zero, often needs $500-1,500 in catch-up service in year one, and puts the rebuild decision back on your timeline rather than the manufacturer's. The right answer depends on how many seasons you intend to keep the boat and whether you have the cash to absorb a surprise. At Harris Boat Works we sell both. Here is how we actually help customers decide.
What "new" actually buys you
The headline difference is warranty. A new Mercury FourStroke or Pro XS purchased through an authorized dealer comes with a 3-year factory limited warranty. Current promotions can extend total coverage; see current offers. Mercury Product Protection (the factory extended program) is available beyond that and is quoted at time of sale. That window covers the engine, the powerhead, and most of the components that fail catastrophically.
The less obvious benefit is known maintenance horizon. With a new motor you know:
- First 20-hour service is on the dealer's calendar
- 100-hour service intervals are predictable for the first 5-7 years
- Impeller, plugs, and gearcase service have a documented baseline
- If something fails inside the warranty period, it is the manufacturer's problem
The third benefit is current technology. The 2027 Mercury lineup includes refinements in EFI calibration, SmartCraft integration, and noise reduction that did not exist on motors built before 2020. If you care about the smoothness and fuel economy of the new engines, you can feel the difference in a 30-second test drive.
The downside is the price. A new Mercury 90 FourStroke ELPT installed and rigged on a typical Ontario aluminum boat lands in the $13,000 to $15,000 range depending on the package. New 115s go higher. That is real money to write a cheque for in May.
What "used" actually buys you
A clean, well-documented used Mercury from a known dealer or a careful private seller will run 50-60% of the new price for the same horsepower class. A 2018 Mercury 90 FourStroke with under 400 hours and a service history might sell for $6,000-$8,000 in southern Ontario. That is real money you keep in your account.
The catch is what you do not get:
- Warranty. Once the factory window has expired, you own every repair.
- Documented service history. Many private-sale Mercurys come with vague claims and no receipts. You are guessing about impeller intervals, gear lube changes, and whether the last owner ran ethanol-blended fuel through winter.
- The seller's leverage on price. A used motor in a private sale rarely comes with the structured negotiation room a dealer can offer.
The smart used-motor purchase has three properties:
- A documented service history from a Mercury dealer (not a "yeah I changed the oil" verbal).
- A compression test at the time of sale, with numbers within 5% across all cylinders.
- A reasonable run time at the dock or on water to confirm cold start, idle, and full-throttle behaviour.
If you cannot get all three, the motor is a coin flip, not a deal.
The break-even math, for an Ontario buyer
Here is a realistic comparison we walk customers through at the marina. Numbers are in CAD and apply to a typical 90 HP repower in 2026.
| Item |
New Mercury 90 ELPT |
Used Mercury 90 (2018-2020, ~400 hrs) |
| Motor purchase |
$11,500 |
$6,500 |
| Install and rigging |
$2,500 |
$1,500 (controls usually transfer) |
| Year-one service (catch-up) |
$250 (20-hour) |
$800-1,200 (impeller, plugs, gear lube, full diagnostic) |
| Warranty |
3 years factory (see /promotions for current offers) |
None |
| Expected service cost years 2-5 |
$1,000-$1,500 |
$1,500-$2,500 (no warranty cushion) |
| 5-year all-in estimate |
$15,500-$16,000 |
$10,300-$12,000 |
The used motor saves you roughly $3,500-$6,000 over five years. But the new motor saves you the uncertainty premium, which is hard to put a dollar value on until the day a $4,000 powerhead repair lands in your driveway.
The trade-in wrinkle: HST only on the difference
One more piece of math most buyers miss. In Ontario, when you trade your old motor (or boat) in to a dealer, HST is charged on the difference between the new purchase and your trade-in allowance, not the full sticker. A $3,500 trade against a $13,000 repower means you pay tax on $9,500, which keeps roughly $455 in your pocket on top of the trade value itself. A private sale has no equivalent lever. It narrows the new-vs-used gap more than most people expect, and it is worth running before you decide. Curious what your current motor is worth? Our outboard trade-in guide covers how we value trades.
When new is the right answer
The new-Mercury decision usually wins when at least two of these are true:
- You plan to keep the boat 7+ years
- You finance the purchase (warranty matters more when you are still making payments on a dead motor)
- You boat in remote areas where a tow-in or breakdown costs you more than money (cottage country, long crossings, family weekends that cannot be cancelled)
- The boat itself is structurally sound and worth pairing with a long-lived motor
Customers we steer toward new: repower projects on solid hulls (an 18-foot aluminum that is going to outlive everyone), first-time boat buyers who want a one-decision setup, and anyone with kids who are about to learn to water-ski.
You can build a live CAD quote for your repower online at Mercury Repower Centre.
When used is the right answer
The used-Mercury decision usually wins when at least two of these are true:
- You plan to keep the boat 3-5 years and then move on
- You pay cash and can absorb a surprise repair
- You are mechanically inclined and willing to do basic service yourself
- The price difference funds something else important to you (a better trailer, a better cover, an actual fishfinder)
Customers we steer toward used: occasional weekenders who do not log many hours, buyers replacing a tired motor on a boat they plan to flip in a few years, and people who genuinely enjoy the wrench-it-yourself side of boating.
What we do at Harris Boat Works
We are a Mercury Premier dealer, which means new motor sales and Mercury Product Protection paperwork are a core part of the business. We also broker used boats and motors regularly, sometimes from trade-ins, sometimes from local consignment, sometimes from estate sales. When a customer walks in deciding between a $13,000 new repower and a $7,500 used motor, we do not push one direction. We walk through the math above with the customer's actual boat and actual budget, and the honest answer is usually obvious by the end of the conversation.
If you are weighing this decision and want a second set of eyes, drop us an email at info@harrisboatworks.ca with the boat's specs, the used motor's documented history (if you have it), and a rough budget. We will tell you what we would do in your situation.
If you are looking at a used boat package and want a structured inspection before you buy, our printable Used Boat Walkaround Guide covers the 13-page checklist we use ourselves.
About the author
Jay Harris helps run Harris Boat Works, a third-generation family marina in Gores Landing on Rice Lake, established in 1947. HBW is a Mercury Marine Premier Dealer and Legend Boats dealer serving Rice Lake, the Kawarthas, and Ontario boaters who want straight answers before spending real money. Read Jay's full bio.
Related guide: When selling the boat is the right answer.
Sources
- Mercury Marine Canada warranty policy (mercurymarine.com/ca/en)
- Mercury Product Protection extended warranty program details (Mercury Dealer Portal, reviewed 2026)
- HBW internal repower pricing data, 2024-2026 service records
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