Quick Answer Lake Ontario salmon and trout trolling typically calls for a Mercury 200 - 300 HP V8 FourStroke on a 21 - 26 ft deep-V hull, often paired with a 15 HP ProKicker for the slow downrigger trolling speeds. Lake Ontario is not Rice Lake, it's open, cold, and capable...
Quick Answer
Lake Ontario salmon and trout trolling typically calls for a Mercury 200–300 HP V8 FourStroke on a 21–26 ft deep-V hull, often paired with a 15 HP ProKicker for the slow downrigger trolling speeds. Lake Ontario is not Rice Lake, it's open, cold, and capable of serious swells. Pick the bigger end of your hull's power range. Quote installed at mercuryrepower.ca.
Lake Ontario is Different Fishing Water
Most of our customers who fish Rice Lake have been at it for years. They know the railway hazard, they know the weed beds, they know what happens when the wind builds from the west at 2 p.m.
Lake Ontario is a different problem. The lake covers more than 19,000 km². Swells can exceed 6 feet on a bad day. Fishing zones are often 5–15 km offshore. Downrigger spreads add significant drag. When conditions change on Lake Ontario, they can change faster than on any sheltered freshwater lake.
That affects motor selection in three specific ways:
Bigger boats. 22–26 ft deep-V hulls weigh significantly more than the aluminum fishing boats on Rice Lake. Fully loaded with crew, downriggers, planer boards, and electronics, all-up weight can exceed 6,000 lbs. Adequate HP is not optional, it affects both performance and safety margins.
Bigger kicker. The 9.9 ProKicker that handles Rice Lake walleye trolling is undersized for Lake Ontario salmon spreads. The drag from multiple downriggers, planer boards, and dipsy divers requires the 15 HP ProKicker for proper speed control.
More reliable motor selection. Long offshore runs, multi-hour trolling days, and weather windows that can close faster than anticipated put a premium on motor reliability. This is where Mercury's service network, parts availability, and Mercury Platinum dealer support matter.
Cold Water Safety, A Note Worth Reading
Lake Ontario's water stays cold well into summer and drops cold again early in fall. Transport Canada's guidance on cold-water immersion is clear: water below 15°C reduces cold shock survival time significantly, even for strong swimmers.
Dress for water temperature, not air temperature. Wear a PFD. File a float plan. These aren't formalities, they're the difference between a bad day and a tragedy. The lake doesn't negotiate.
Mercury Options by Lake Ontario Use Case
Recreational Salmon and Trout Trolling
Recommended: 22–25 ft deep-V or walkaround hull + Mercury 250–300 HP V8 FourStroke + 15 HP ProKicker.
The Mercury V8 FourStroke in this range is the standard for Lake Ontario recreational salmon fishing. Smooth cruise, solid fuel economy at trolling speeds, and well-matched to typical 22–25 ft hulls with full gear.
Tournament Salmon Fishing
Recommended: 23–28 ft deep-V + Mercury 300 HP Pro XS V8 (or twin engines for some operators) + 15 HP ProKicker.
Tournament use rewards the Pro XS for faster acceleration and more water covered during tournament hours. Some serious operators run twin 200–250 HP setups for redundancy and performance on bigger boats.
Charter Fishing Operations
Recommended: 26–30+ ft deep-V + Mercury 300–400 HP 300-350 HP Pro XS V8 or SeaPro commercial-duty variant + 15 HP ProKicker.
Charter operations push motors through hard daily cycles. Mercury SeaPro variants are built specifically for commercial-duty use. For engine repairs on a charter operation, we only service Mercury and Mercruiser.
Multi-Species Sport Fishing (Salmon, Walleye, Bass)
Recommended: 21–24 ft deep-V + Mercury 200–250 HP V8 FourStroke + 15 HP ProKicker.
The same boat handles salmon trolling offshore, walleye fishing on Bay of Quinte, and bass fishing on connected waters. Versatile setup for anglers who move between species across the season.
Lake Ontario HP decision
How far offshore do you actually run for salmon?
Lake Ontario is two different fisheries. Be honest about the one you fish most.
Near-shore and calm bays
- ✓Most days you stay within sight of the marina
- ✓You troll in protected water and only leave on calm forecasts
- ✓Fuel economy matters more than top end
- ✓Boat is 17 to 19 ft with a single main
Mercury 115 to 150 FourStroke, no kicker required
20+ miles for offshore salmon
- ✓You run east-west to find temperature breaks
- ✓You fish 3 to 6 ft chop regularly, not just on calm days
- ✓A 9.9 ProKicker for slow trolling is non-negotiable
- ✓Boat is 21 ft or bigger with offshore-rated hull
Pro XS or FourStroke V8 (200 to 300 HP) plus 9.9 ProKicker
When in doubt:If you have ever been caught out when Lake Ontario turned, size up the main and add the kicker. The lake does not negotiate.
You can build a live CAD quote for your repower online at Mercury Repower Centre.
Mercury Pro XS V8 vs FourStroke V8, Which One for Lake Ontario?
Both are capable on Lake Ontario. Here's the honest comparison:
V8 FourStroke (200–300 HP): Smoother running, slightly better fuel economy at cruise and trolling speeds. The right choice for recreational fishing with an emphasis on fishing comfort over top-end performance.
Pro XS V8 (200–300 HP): Faster acceleration, slightly higher top speed, tournament-tuned throttle response. Worth the premium for tournament fishing. Harder to justify for recreational use where the FourStroke is quieter and comparably efficient.
At the same HP, the Pro XS carries a price premium. Build both at mercuryrepower.ca and compare.
What HBW Asks Before Recommending a Lake Ontario Setup
Hull make, model, year, and length. Current vs planned motor. Your primary fishing use (recreational, tournament, charter). How far offshore you typically run. Whether you're at a slip or trailering. Budget.
We quote Lake Ontario repowers through mercuryrepower.ca. If you want to talk through the setup before configuring, call us at 905-342-2153.
A Note on HBW's Lake Ontario Coverage
Harris Boat Works is on Rice Lake in Gores Landing, we're not a Port Credit or Whitby harbour marina. But we do quote, sell, and install Mercury motors for Lake Ontario anglers, and we service Mercury and Mercruiser motors regardless of where the boat fishes. For engine repairs, we only service Mercury and Mercruiser.
If your boat is slip-stored in a Lake Ontario marina and you need engine service there, they'll have their own shop. For motor purchases, repower quotes, and service on boats that come to us, we're the answer.
Related guides
- Recommended Mercury Outboard Setup for Lake Simcoe Walleye Fishing (2026): A 2026 guide to fishing Lake Simcoe: species, seasons, FMZ 16 regulations, the open-water conditions, and the.
- Lake Ontario Salmon Mercury Setup Guide (Ontario Dealer, 2026): Lake Ontario salmon trolling setup from an Ontario Mercury Platinum dealer. Real numbers on alternator.
- Rice Lake Ontario Fishing Guide 2026: An honest 2026 guide to fishing Rice Lake, Ontario: species, seasons, FMZ 17 regulations, top spots and the.
- Best Boats for Rice Lake Under $30,000 (2026 Buyer's Guide): Under $30,000 CAD on Rice Lake in 2026: a new small aluminum with a Mercury under 60 HP, a used pontoon, or a.
FAQs
What HP do I need for Lake Ontario salmon fishing?
For most 22–26 ft hulls, 250–300 HP is the range. The right number depends on hull weight, use case, and whether you're running tournaments or recreational. Never exceed your capacity plate.
Why a 15 HP kicker instead of a 9.9 for Lake Ontario?
The drag from full downrigger spreads, planer boards, and dipsy divers is more than a 9.9 can hold speed against cleanly. The 15 HP ProKicker is the standard for Lake Ontario salmon trolling.
Can I use the same boat for Rice Lake and Lake Ontario?
It depends on the hull. A 22+ ft deep-V rigged for Lake Ontario is over-gunned and over-sized for Rice Lake's shallow structure. A 18 ft aluminum console rigged for Rice Lake is genuinely undersized for Lake Ontario conditions. Most serious Lake Ontario anglers have a Lake Ontario-specific boat.
FourStroke or Pro XS for recreational salmon fishing?
FourStroke. The Pro XS earns its premium for tournament use. For recreational fishing, the FourStroke is quieter and the fuel economy is comparable.
Do you service Lake Ontario boats?
For engine repairs, we only service Mercury and Mercruiser. Schedule at hbw.wiki/service.
How do I get a Lake Ontario repower quote?
mercuryrepower.ca, configure your motor, get a real number.
Internal Links
Build Your Lake Ontario Setup
Configure your motor, V8 FourStroke, Pro XS, or ProKicker, at mercuryrepower.ca. Live pricing in CAD, no games.
Questions before you configure? Call 905-342-2153.
Ready to price it out? Build a live CAD quote for your repower online at the Mercury Repower Centre.
Harris Boat Works | Mercury Marine Platinum Dealer | Family-owned since 1947 | Mercury dealer since 1965 | Gores Landing, ON
