How much does a new 90 HP Mercury motor cost installed in Ontario?

Expect roughly $14,000 to $17,000 CAD installed at Harris Boat Works in 2026, including the motor, controls, propeller, rigging, and water test on Rice Lake. Final cost depends on your boat, existing rigging, and any trade-in. Live pricing at mercuryrepower.ca.

Is the 90HP worth the upgrade from 75HP?

For most boaters, the jump from 75 to 90HP provides modest improvement. We often recommend either the 75HP (for efficiency/tiller) or jumping to 115HP (for meaningful performance gain).

Going from 75/90 to 115 is possible but means buying a new motor. It's almost always better to buy the right HP initially. Rigging costs add up with motor swaps.

Which has better resale value?

The 115HP consistently commands the best resale prices. It's the most popular horsepower in this range, and buyers often seek it specifically.

Is the Mercury 90 HP worth the upgrade from 75 HP?

The 90 HP is worth the upgrade from 75 HP if you regularly carry three or more people, deal with wind on open water, or want more than light fishing use. The 90 HP shares the same block and physical weight as the 75 HP, more power without added transom weight. The key tradeoff is that the 90 HP has no tiller option, whereas the 75 HP does. If tiller steering matters, stay with the 75. If you want remote steering and more power, the 90 is a solid step at typically a modest price difference.

What is the fuel economy difference between Mercury 75, 90, and 115 HP?

At typical cruising speeds, fuel economy differences between these three EFI FourStrokes are smaller than most people expect. Day-to-day on a 17 ft fishing boat, the difference in a full day's fuel cost between a 75 and 115 HP is approximately $5-$15 depending on how hard you run. The 115's efficiency advantage is that it's not being pushed as hard to maintain cruising speed, which offsets some of its larger displacement. Biggest differences appear at the extremes, low-speed and wide-open-throttle.

Can I upgrade my outboard to a higher HP later?

Upgrading to a higher HP is possible up to your boat's capacity plate maximum. If your hull is rated for 115 HP and you currently have a 75 HP, upgrading later is straightforward, just motor cost plus installation. If your hull is only rated for 75 HP, you cannot legally put a 115 HP on it. The practical implication: if your hull allows 115 HP, starting there now is often a better financial decision than buying 75 HP and replacing it in 3-5 years.

Which has better resale value. Mercury 75, 90, or 115 HP?

The Mercury 115 HP FourStroke consistently holds the best resale value of the three because it covers more use cases and appeals to more buyers. The 90 HP falls in between. Motors with broader use-case appeal and stronger original MSRP hold value better. The 115 HP's Command Thrust option, strong torque, and versatility make it the most sought-after of the three on Ontario's used boat market.

What is the best Mercury outboard for a 17 ft aluminum fishing boat on Rice Lake?

For a 17 ft aluminum fishing boat on Rice Lake, the Mercury 75 HP or 90 HP FourStroke are both strong choices. For solo or two-person fishing with tiller control, the 75 HP tiller is efficient and well-suited to Rice Lake's shoreline work. For two or three regular passengers or more open-water conditions, the 90 HP provides better loaded performance at the same weight. The 115 HP is worth considering if the hull is heavier or you want long-term headroom. Harris Boat Works. Mercury dealer since 1965 in Gores Landing on Rice Lake, can assess your specific hull and recommend the right choice.

Is the Mercury 115 HP Command Thrust worth it?

The Mercury 115 HP Command Thrust is worth considering for heavy pontoon boats, larger aluminum fishing boats, and any boat that trolls at slow speeds or pushes significant load regularly. Command Thrust uses a larger lower unit designed for a larger diameter, lower-pitch prop, producing more thrust at low speeds. For a typical 17-18 ft aluminum fishing boat, standard shaft 115 HP is sufficient. For a 20-22 ft pontoon or deep-v that carries full loads, Command Thrust is a meaningful upgrade.

What Mercury outboard should I choose for a 20 ft pontoon on the Kawarthas?

For a 20 ft pontoon on Kawartha Lakes, the Mercury 90 or 115 HP FourStroke is the right choice. A 20 ft pontoon with 60 HP struggles with a full passenger load and headwinds. The 90 HP handles typical pontoon loads well. The 115 HP is the better long-term choice, extra torque at low speeds and the Command Thrust option suit pontoon use well. For six or more passengers or a heavier tritoon, go straight to 115 HP.

Does Mercury offer a tiller option on the 90 or 115 HP FourStroke?

No, neither the Mercury 90 HP nor the Mercury 115 HP FourStroke is available in a tiller configuration. Of these three horsepower classes, only the 75 HP offers a tiller option. If tiller control is important, working from the back of a small aluminum boat, setting up drifts, or solo fishing, the 75 HP tiller is the model designed for that use case. If you need more than 75 HP and want remote steering, the choice between 90 and 115 becomes about power and future-proofing.

90 HP Mercury Motor vs 75 and 115 HP: Which One We'd Pick (2026)

Last reviewed: 2026-05-07 > Quick answer: Same powerhead, different tuning and gearcase. The 90 is the sweet spot for most 17-19 ft aluminum and fibreglass hulls, best balance of price, fuel use, and performance. The 115 makes sense on heavier or wider transoms, especially...

Mercury Platinum Dealer·Family-owned since 1947·Mercury dealer since 1965·Gores Landing, ON·Quote builder available

Last reviewed: 2026-05-07

Quick answer: Same powerhead, different tuning and gearcase. The 90 is the sweet spot for most 17-19 ft aluminum and fibreglass hulls, best balance of price, fuel use, and performance. The 115 makes sense on heavier or wider transoms, especially Command Thrust on pontoons. The 75 is rare in Ontario. Compare installed pricing at mercuryrepower.ca.

For most 16 to 18 ft aluminum console boats on Kawartha and Ontario freshwater, the Mercury 90 HP FourStroke is the practical sweet spot. The 75 HP saves about $1,000 to $2,000 CAD up front but leaves boats underpowered when loaded. The 115 HP costs $1,500 to $2,500 CAD more than the 90 but gives meaningful headroom for family use and rougher water. Live pricing on each is at /quote/motor-selection For current CAD pricing on every Mercury we stock, see the Mercury pricing reference..

Real-world performance varies with hull, load, prop, mounting height, water conditions, and rigging. Numbers below are typical ranges from boats we've rigged at HBW; treat them as ballpark, not guarantees.

Quick recommendation

The 90 HP FourStroke is the most-installed mid-range Mercury at HBW. There is a reason: it fits the most common boat (16 to 18 ft aluminum console), the most common use (family fishing, mixed recreational), and the most common hull rating (75 to 115 HP capacity plate). It hits the price-performance sweet spot that the 75 misses on power and the 115 misses on value for lighter use.

When customers ask "75, 90, or 115?" we usually walk through three things: hull length, typical loading, and use case. The right answer comes out of those three. For most Ontario freshwater customers, the answer is 90. For lighter use on shorter hulls, the 75 is enough. For heavier loading or bigger water, the 115 earns the price difference.

What changes the answer

Five things move whether 75, 90, or 115 is right for your boat:

Hull length and weight. A 16 ft aluminum at 90 HP feels different than a 18 ft fiberglass at 90 HP. Heavier hulls need more HP to plane reliably.
Passenger and gear loading. Two-person fishing is one motor. Family of four with cooler, gear, and kids is another motor entirely.
Where you launch. Sheltered Rice Lake bays vs. open Lake Ontario chop changes the practical HP minimum. Wind exposure punishes underpowering.
Trolling vs. cruising emphasis. All three motors troll fine with a 9.9 ProKicker. The HP question is about cruising and run-back performance.
Capacity plate maximum. Most boats in this size range are rated 75 to 115 HP or 90 to 150 HP. The plate sets the ceiling. We will not over-power.

Side-by-side: Mercury 75 vs 90 vs 115 FourStroke

For typical Ontario use on 16 to 18 ft aluminum console boats:

Factor	75 EXLPT FourStroke	90 EXLPT FourStroke	115 EXLPT FourStroke
Engine type	Inline 4-cyl, 1.7L	Inline 4-cyl, 2.1L	Inline 4-cyl, 2.1L
Weight (XL shaft)	~163 kg / 359 lb	~163 kg / 359 lb	~163 kg / 359 lb
Top speed (16 ft aluminum)	~30 to 35 mph	~35 to 40 mph	~40 to 45 mph
Top speed (18 ft aluminum)	~25 to 30 mph	~30 to 35 mph	~35 to 40 mph
Hole shot	Adequate solo, soft loaded	Strong solo, adequate loaded	Strong loaded
Fuel economy at cruise	Best of the three	Excellent	Slightly less than 90
Best fit	14 to 16 ft light aluminum	16 to 18 ft aluminum console	17 to 19 ft aluminum or light fiberglass
Use case	Solo or two-person	Family of three or four	Family of four or five with gear
Tournament use	No	Marginal	Yes (FourStroke) or step to Pro XS

Note: top-speed numbers vary by hull design, prop selection, and loading. These are typical Kawartha-area sea-trial results for representative aluminum console hulls. For your specific boat, sea-trial numbers from HBW will be more accurate.

For specific pricing on each motor, build a quote.

Mercury 75 EXLPT FourStroke: when it fits

The 75 HP FourStroke is the right call when:

Hull is 14 to 16 ft and lighter aluminum. Smaller hulls do not need 90+ HP for typical use.
Use is solo or two-person fishing primarily. Lighter loading lets the 75 shine.
Sheltered water, calm conditions. Rice Lake bays, smaller Kawartha lakes, sheltered cottage water.
Budget is tight and the next class up does not justify the difference for your specific situation.

The 75 saves real money on a budget-tight repower. The downside shows up when the boat is loaded or when wind comes up. If you regularly run with a full crew or in choppy water, the 75 will leave you wishing for more.

Mercury 90 EXLPT FourStroke: the sweet spot

The 90 HP FourStroke is the right call when:

Hull is 16 to 18 ft aluminum console. This is the most common Kawartha repower hull.
Use is family fishing or mixed recreation. Two to four people, gear, mixed cruising and fishing.
Capacity plate rating is 90 to 115 HP (very common range on this boat size).
You want headroom without paying for HP you do not need.

The 90 is the most-installed Mercury in this class for a reason. It performs well across the most common use cases, it qualifies for similar promotional pricing as the 75, and the long-term ownership math (fuel economy, parts, resale) is favorable. The Mercury 90 EXLPT is the workhorse of the Canadian recreational fleet.

For the typical 16 to 18 ft aluminum console at HBW, the all-in repower lands $17,000 to $22,000 CAD. Live pricing here.

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Mercury 115 EXLPT FourStroke: when the step-up earns its price

The 115 HP FourStroke is the right call when:

Hull is 17 to 19 ft aluminum or light fiberglass. Bigger hulls justify the bigger motor.
Use is family of four or five with gear, or active fishing with multiple anglers.
You launch on bigger water (Lake Simcoe, Lake Ontario, Bay of Quinte) or run the Trent-Severn system.
Capacity plate rating is 115 HP or higher.
You want the option of running Pro XS later (115 Pro XS slots into the same gearcase footprint as the 115 FourStroke).

The 115 step-up over the 90 is meaningful in real-world performance: better hole shot when loaded, better cruise speed, more headroom in chop. The price premium over the 90 is real but not enormous. Most customers who step up do not regret it. Most customers who buy 90 also do not regret it. There is no wrong answer if the boat fits both.

What HBW checks before recommending 75, 90, or 115

When customers come in deciding between these three motors, we want to know:

Boat make, model, year, length, and weight class
Maximum HP rating on the capacity plate
Typical passenger and gear loading
Primary use case (fishing, family, mixed)
Where you launch (sheltered vs. open water)
Trolling-heavy or run-and-gun preference
Existing prop and rigging condition
Long-term ownership plan
Budget and financing tolerance

The answer comes out of these. Most customers fall into "90 is the right call." Some fall into "75 is enough for what you do." Some fall into "the 115 will pay back the price difference in how the boat performs." We give the honest answer per boat.

Common 75/90/115 mistakes

We see these every season:

Buying 75 to save $1,500 and regretting it. Customers who pick the 75 to cut budget often trade up to a 90 or 115 within 2 to 3 seasons. They paid the 75 price plus the trade-up cost. Should have bought the 90 the first time.
Buying 115 when 90 was plenty. A 115 on a 16 ft aluminum used solo for fishing is overkill. The motor outpowers the hull's typical load. The savings on the 90 buy electronics, props, or kicker upgrades that matter more.
Picking on top speed alone. All three motors have similar top-speed numbers within 5 mph. The real difference is hole shot and load-handling. Top speed rarely matters in real-world use.
Ignoring the prop. The right prop on a 75 sometimes outperforms a wrong prop on a 115. Prop selection during sea-trial is critical. We test props on every repower.
Skipping the kicker decision. The 9.9 ProKicker question is separate from the 75/90/115 question. Most fishing customers want a kicker regardless of which main motor.

Mercury 75/90/115 Pro XS: when to step up the family

All three HP classes have Pro XS variants. The Pro XS step-up over FourStroke at the same HP costs an extra $1,000 to $1,500 CAD and gives you faster acceleration and slightly higher top speed.

Pro XS is the right call when:

Tournament-level performance is the priority.
Bass boat or performance hull where acceleration matters.
You want the fastest run-out to morning fishing spots.

For typical recreational use (fishing, family, mixed), FourStroke at the same HP is the better value. Pro XS earns the price difference on tournament hulls, not on family aluminum consoles. See our Mercury motor families guide for the full FourStroke vs Pro XS picture.

Related guides

Mercury 115 vs 150 HP for Ontario Boats, the next step-up question
How to Choose the Right Horsepower for Your Boat, full HP class guide
Best Mercury Outboard for Aluminum Fishing Boats, aluminum-specific recommendations
Mercury Motor Families: FourStroke vs Pro XS vs Verado, which family fits your use
Mercury Propeller Selection Guide, prop selection meaningfully changes performance

Ready to pick your motor?

Build a quote for 75, 90, or 115 HP on the motor selection page. Live Mercury pricing in CAD with full configuration including rigging and prop.

Build Your Mercury Quote

If you want to talk through the decision for your specific boat before you build, give us a call at (905) 342-2153. We rig boats in this HP class every week and can give you the honest answer for your hull and use case.

Pricing ranges in this article are HBW's working 2026 estimates, verified May 2026. The actual price for your specific motor and configuration is on the motor selection page, which is the source of truth and updates as Mercury pricing and HBW promotions change. Mercury model years change every July 1, and we refresh ranges in articles annually.

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 Platinum 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.

FAQ

Is a Mercury 75 enough for a 16-foot aluminum boat? For solo or two-person use on sheltered water, yes. For family use with three or more passengers and gear, the 90 is a better fit. The 75 will plane the boat solo but feels underpowered when loaded.

Should I get the 90 or 115 for my 17-foot fishing boat? For typical fishing use with two anglers and gear, the 90 is plenty. For family use with four or five people, or fishing on bigger water (Lake Simcoe, Lake Ontario), step up to the 115. The price difference is small relative to the all-in repower cost.

Is the Mercury 115 worth the extra money over the 90? For 17 to 19 ft hulls, family use, or bigger-water boating, yes. The 115 gives meaningful headroom and better hole shot when loaded. For 16 to 18 ft aluminum used for two-person fishing, the 90 is plenty and the savings are better spent on a kicker or electronics.

What is the most popular Mercury for 16 to 18 ft aluminum console boats? The Mercury 90 EXLPT FourStroke. It is the most-installed mid-range Mercury at HBW because it fits the most common boat and use case. Reliable, fuel-efficient, and well within most boat capacity ratings.

Can I run a Mercury 115 on a boat rated for 90 HP maximum? No. The capacity plate sets the legal and warranty-backed ceiling. Mercury voids warranty if we install a motor above the rated maximum. The Coast Guard plate is set by the manufacturer based on hull testing. Going above is illegal and unsafe.

What's the fuel economy difference between 75, 90, and 115? At cruise speed, the 75 is most efficient. The 90 is very close. The 115 is slightly less efficient than the 90 but still very good. The differences are small in real terms (often less than 10% between 75 and 115). Loading and prop selection move fuel economy more than HP class within this range.

Should I get FourStroke or Pro XS in this HP range? For most recreational use, FourStroke is the better value. Pro XS earns its price on tournament hulls and performance applications. The Pro XS price premium is $1,000 to $1,500 CAD over the FourStroke at the same HP.

What about Mercury Command Thrust on a 90 or 115? Command Thrust is the gearcase option built for heavy boats (pontoons, work boats, heavy fishing rigs). On 16 to 18 ft aluminum console boats, the standard gearcase is fine. On 18+ ft pontoons, Command Thrust is usually the right call. We assess this per boat.

Can I keep my existing controls and rigging when going from a 75 to a 90 or 115? Mercury-to-Mercury repowers in this HP range usually keep existing controls if they are post-2010 and in good condition. Wiring harness and rigging are usually compatible across the 75/90/115 range. Older or non-Mercury rigging may need replacement.

What's the typical prop for a Mercury 90 on a 16 to 18 ft aluminum? Aluminum 3-blade in the 13 to 15 inch pitch range, depending on hull weight and intended use. We test props during sea-trial of every repower. The right prop pitch is the one that lets the motor reach rated WOT RPM with typical loading. See our propeller selection guide.

How long does a Mercury 90 last with proper maintenance? Modern FourStrokes properly maintained last 1,500 to 2,000+ engine hours. For a typical recreational boater (50 to 150 hours per season), that translates to 10 to 30 years of useful life. Skipped maintenance cuts that in half easily. See our Mercury maintenance guide for the seasonal cycle.

What's the all-in cost of a Mercury 90 repower in Ontario? For a typical 16 to 18 ft aluminum console with rigging, prop, and install, $17,000 to $22,000 CAD before HST at HBW. The 75 is about $1,000 to $2,000 less, the 115 about $1,500 to $2,500 more. Live pricing here.

Frequently Asked Questions

How much does a new 90 HP Mercury motor cost installed in Ontario?: Expect roughly $14,000 to $17,000 CAD installed at Harris Boat Works in 2026, including the motor, controls, propeller, rigging, and water test on Rice Lake. Final cost depends on your boat, existing rigging, and any trade-in. Live pricing at mercuryrepower.ca.
Is the 90HP worth the upgrade from 75HP?: For most boaters, the jump from 75 to 90HP provides modest improvement. We often recommend either the 75HP (for efficiency/tiller) or jumping to 115HP (for meaningful performance gain).
What's the fuel economy difference?: At cruise speeds, the difference is minimal (0.5-1 GPH). The 115HP has a larger displacement engine that's more efficient under load. All three are excellent on fuel.
Can I upgrade later?: Going from 75/90 to 115 is possible but means buying a new motor. It's almost always better to buy the right HP initially. Rigging costs add up with motor swaps.
Which has better resale value?: The 115HP consistently commands the best resale prices. It's the most popular horsepower in this range, and buyers often seek it specifically.
Is the Mercury 90 HP worth the upgrade from 75 HP?: The 90 HP is worth the upgrade from 75 HP if you regularly carry three or more people, deal with wind on open water, or want more than light fishing use. The 90 HP shares the same block and physical weight as the 75 HP, more power without added transom weight. The key tradeoff is that the 90 HP has no tiller option, whereas the 75 HP does. If tiller steering matters, stay with the 75. If you want remote steering and more power, the 90 is a solid step at typically a modest price difference.
What is the fuel economy difference between Mercury 75, 90, and 115 HP?: At typical cruising speeds, fuel economy differences between these three EFI FourStrokes are smaller than most people expect. Day-to-day on a 17 ft fishing boat, the difference in a full day's fuel cost between a 75 and 115 HP is approximately $5-$15 depending on how hard you run. The 115's efficiency advantage is that it's not being pushed as hard to maintain cruising speed, which offsets some of its larger displacement. Biggest differences appear at the extremes, low-speed and wide-open-throttle.
Can I upgrade my outboard to a higher HP later?: Upgrading to a higher HP is possible up to your boat's capacity plate maximum. If your hull is rated for 115 HP and you currently have a 75 HP, upgrading later is straightforward, just motor cost plus installation. If your hull is only rated for 75 HP, you cannot legally put a 115 HP on it. The practical implication: if your hull allows 115 HP, starting there now is often a better financial decision than buying 75 HP and replacing it in 3-5 years.
Which has better resale value. Mercury 75, 90, or 115 HP?: The Mercury 115 HP FourStroke consistently holds the best resale value of the three because it covers more use cases and appeals to more buyers. The 90 HP falls in between. Motors with broader use-case appeal and stronger original MSRP hold value better. The 115 HP's Command Thrust option, strong torque, and versatility make it the most sought-after of the three on Ontario's used boat market.
What is the best Mercury outboard for a 17 ft aluminum fishing boat on Rice Lake?: For a 17 ft aluminum fishing boat on Rice Lake, the Mercury 75 HP or 90 HP FourStroke are both strong choices. For solo or two-person fishing with tiller control, the 75 HP tiller is efficient and well-suited to Rice Lake's shoreline work. For two or three regular passengers or more open-water conditions, the 90 HP provides better loaded performance at the same weight. The 115 HP is worth considering if the hull is heavier or you want long-term headroom. Harris Boat Works. Mercury dealer since 1965 in Gores Landing on Rice Lake, can assess your specific hull and recommend the right choice.
Is the Mercury 115 HP Command Thrust worth it?: The Mercury 115 HP Command Thrust is worth considering for heavy pontoon boats, larger aluminum fishing boats, and any boat that trolls at slow speeds or pushes significant load regularly. Command Thrust uses a larger lower unit designed for a larger diameter, lower-pitch prop, producing more thrust at low speeds. For a typical 17-18 ft aluminum fishing boat, standard shaft 115 HP is sufficient. For a 20-22 ft pontoon or deep-v that carries full loads, Command Thrust is a meaningful upgrade.
What Mercury outboard should I choose for a 20 ft pontoon on the Kawarthas?: For a 20 ft pontoon on Kawartha Lakes, the Mercury 90 or 115 HP FourStroke is the right choice. A 20 ft pontoon with 60 HP struggles with a full passenger load and headwinds. The 90 HP handles typical pontoon loads well. The 115 HP is the better long-term choice, extra torque at low speeds and the Command Thrust option suit pontoon use well. For six or more passengers or a heavier tritoon, go straight to 115 HP.
Does Mercury offer a tiller option on the 90 or 115 HP FourStroke?: No, neither the Mercury 90 HP nor the Mercury 115 HP FourStroke is available in a tiller configuration. Of these three horsepower classes, only the 75 HP offers a tiller option. If tiller control is important, working from the back of a small aluminum boat, setting up drifts, or solo fishing, the 75 HP tiller is the model designed for that use case. If you need more than 75 HP and want remote steering, the choice between 90 and 115 becomes about power and future-proofing.

Harris Boat Works · 5369 Harris Boat Works Rd, Gores Landing, ON · (905) 342-2153

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