The Ultimate Guide to the 40 Horse Mercury Outboard Motor

H1: Mercury 40HP Outboard: A Complete 2024 Buyer’s Guide on Price, Performance and Value

Choosing the right outboard motor is a critical decision that balances power, reliability and budget. You need an engine that starts every time, delivers the performance you expect and doesn’t break the bank. If your search has led you to the “40 horse mercury,” you’re looking at one of the most popular and versatile mid-range outboards on the water.

If you’re looking for a quick answer, the price of a new Mercury 40HP outboard typically ranges from $7,500 to $9,500 USD for the motor itself, not including prop, controls or installation. The final cost depends on the specific model (Standard, BigFoot, Pro XS), shaft length and your local dealer.

This definitive guide will be your one-stop resource. We’ll break down the costs in detail, compare the different 40HP models feature-by-feature, stack it up against the competition and provide expert tips to ensure you make the best investment for your boat.


Understanding the Mercury 40HP Lineup: Which Model Is Right for You?

Not all Mercury 40HP motors are created equal. Mercury tailors this horsepower block to different boating needs. Understanding the nuances between the models is the first step to making a smart purchase.

A side-by-side comparison of the Mercury 40HP Standard and BigFoot models on a dealer's showroom floor.

Mercury 40HP 4-Stroke (Standard)

This is the workhorse of the lineup. The standard 40HP 4-stroke is a lightweight, compact and fuel-efficient engine perfect for a wide array of small to mid-sized boats.

  • Best For: Aluminum fishing boats, jon boats, small skiffs and modest-sized center consoles.
  • Key Features: It boasts a 3-cylinder design, 12-amp alternator for keeping batteries charged and easy-start electric ignition.
  • Weight: At approximately 205 lbs (for a 20″ shaft), it’s one of the lighter options in its class, which helps maximize boat performance and payload capacity.

Mercury 40HP ELHPT BigFoot

The BigFoot model is engineered for heavier loads. The “BigFoot” name comes from its significantly larger and more robust gear case.

  • Best For: Pontoon boats, small workboats and large, heavy dinghies that require more low-end thrust.
  • Key Features: The larger gear case allows for a higher gear ratio and lets you swing a larger-diameter propeller. This provides superior “bite” in the water and excellent pushing power for planing heavy loads.
  • Weight: It comes in a bit heavier, around 240 lbs, due to its reinforced components.

Mercury 40HP Pro XS

For the angler or boater who demands maximum performance, the Pro XS is the answer. It’s the high-output version of the 40HP platform.

  • Best For: Bass boats, high-performance ski boats and any application where every ounce of speed and acceleration counts.
  • Key Features: The Pro XS often features a different cam profile and engine tuning for more horsepower across the RPM range, a sleek, race-inspired design and premium corrosion-resistant components.
  • Weight: Mercury often uses advanced materials to keep the weight competitive, making it a top choice for power-to-weight ratio seekers.

Breaking Down the Mercury 40HP Outboard Price in 2024

The sticker price you see online is rarely the final price. Let’s demystify the true cost of getting a new Mercury 40HP on your transom and running on the water.

Base MSRP vs. “On-the-Water” Cost

The Manufacturer’s Suggested Retail Price (MSRP) is just the beginning. Here’s a realistic breakdown of what you can expect to pay.

Model Estimated Base MSRP (Motor Only)
40HP 4-Stroke (Standard) $7,500 – $8,200
40HP BigFoot $8,200 – $8,800
40HP Pro XS $8,800 – $9,500+

Critical Add-Ons & Their Costs:
* Propeller: A new prop will cost $200 – $500, depending on the model (aluminum vs. stainless steel) and pitch.
* Control Cables & Binnacle: You’ll need a control box (binnacle) and cables to operate the motor. Budget $400 – $800 for this essential rigging.
* Installation & Rigging: Professional installation is highly recommended. Labor costs can range from $500 to $1,500, depending on the boat’s complexity and dealer rates.

The “On-the-Water” Total: A fully rigged and ready-to-run new Mercury 40HP will typically have a final cost between $9,000 and $11,500+.

Key Factors That Influence Your Final Price

Several variables can push your final cost up or down.

  • Shaft Length: The standard 20″ shaft is common, but for boats with higher transoms, you’ll need a 25″ shaft (long shaft), which may carry a small premium.
  • Local Dealer Markups: Pricing is not universal. Dealers in high-cost-of-living areas or regions with high demand may charge more than those in rural areas.
  • Current Promotions: Mercury Marine often runs seasonal promotions, including rebates or financing deals like 0% APR for qualified buyers. Always ask your dealer about current offers.

Expert Comparison: Mercury 40HP vs. The Competition

How does the Mercury stack up against its two main Japanese rivals? Here’s a straightforward comparison to help you weigh your options.

Mercury 40HP vs. Yamaha 40HP

This is the classic head-to-head battle in the outboard world.

  • Price: The two brands are often very closely matched, with pricing differences usually coming down to specific dealer quotes.
  • Weight: The Yamaha F40 is generally slightly heavier than the standard Mercury 40HP, which can be a consideration for smaller boats.
  • Features: Yamaha often touts its Digital Electric Steering on certain F40 models, which provides effortless, responsive steering. Mercury counters with its proven mechanical steering and strong dealer network.
  • Reliability: Both brands have stellar reputations for reliability and longevity. It’s often said the “best” motor is the one with the best local dealer support.

Mercury 40HP vs. Suzuki DF40A

Suzuki has made a name for itself by offering incredible value and cutting-edge technology.

  • Fuel Efficiency: Suzuki’s Lean Burn Control System is a major selling point, often giving it a slight edge in fuel economy at cruising speeds.
  • Price: Suzuki is frequently the most budget-friendly option among the “big three,” offering a compelling price point for cost-conscious buyers.
  • Weight: The Suzuki DF40A is competitively lightweight, similar to the Mercury standard model.

Real-World Performance and Owner Experience

Spec sheets only tell part of the story. The true test of an outboard is how it performs day in and day out for people like you.

A fisherman on a small aluminum boat, smiling as he operates the tiller handle of a Mercury 40HP outboard on a calm lake.

Fuel Efficiency and Reliability: What Actual Owners Say

Scouring owner forums and reviews reveals a consistent pattern of satisfaction.

  • Praise: Owners consistently report that the Mercury 40HP is “bulletproof,” “starts on the first click” and is “incredibly smooth and quiet” for a 3-cylinder engine. Its fuel efficiency at mid-range RPMs is a frequently highlighted benefit.
  • Complaints: The most common critiques are minor. Some owners of the standard model wish for more low-end grunt for heavier boats (a problem solved by the BigFoot), and a few note that the power trim can be slightly slower than some competitors.

Expert Tips for Maintenance and Longevity

Proper care is what separates a 10-year motor from a 20-year motor. Here is actionable advice to protect your investment.

  • Use Certified Fluids: Always use Mercury-approved 4-stroke engine oil and gear lube. Using uncertified products can void your warranty and harm the engine.
  • The 20-Hour Break-In Service: This is the most important initial service. It involves changing the engine oil and gear lube to remove any initial metal particulates from wear-in. Do not skip this.
  • Annual Winterization: If you live in a cold climate, proper winterization is non-negotiable. This includes fogging the cylinders, stabilizing the fuel and ensuring all water is drained from the cooling system to prevent freeze damage.
  • Anode Inspection: Regularly check the sacrificial anodes on the lower unit. If they are more than 50% corroded, replace them. They are designed to corrode instead of your engine’s critical components.

New vs. Used: A Strategic Cost Analysis

A used outboard can be a great way to save money, but it comes with inherent risks.

  • Pros of Buying Used: The primary advantage is cost. You can often find a 5-year-old Mercury 40HP for $4,000 – $6,500, effectively cutting the price in half.
  • Cons of Buying Used: You inherit the previous owner’s maintenance history (or lack thereof). The warranty may have expired, and you have no guarantee of the engine’s internal condition.

Used Outboard Inspection Checklist:
* Compression Test: All cylinders should be within 10% of each other. Low compression is a major red flag.
* Check for Corrosion: Look for pitting and corrosion, especially around the lower unit and water pump housing.
* Inspect the Oil: Check the engine oil and gear lube for a milky appearance, which indicates water intrusion.
* Ask for Service Records: A seller with detailed records is a huge plus.
* Request a Water Test: The ultimate test is to hear it run under load. It should start easily, idle smoothly and shift crisply.


Frequently Asked Questions (FAQ)

Q: What Is the Fuel Consumption of a Mercury 40HP 4-Stroke?
A: At wide-open throttle, it consumes approximately 4.0 gallons per hour. At a more economical cruising speed (~4500 RPM), it’s significantly more efficient, burning around 2.2 GPH.

Q: Is the Mercury 40HP a Reliable Motor?
A: Yes, the Mercury 40HP 4-stroke is widely regarded as a very reliable workhorse. Its simple design, proven technology and extensive dealer network contribute to its reputation for long-term durability with proper maintenance.

Q: What Is the Difference Between the Mercury 40HP and the 40HP BigFoot?
A: The primary difference is the gear case. The BigFoot model has a larger, more robust gear case and a higher gear ratio, designed to handle heavier loads and swing a larger propeller. This makes it ideal for pontoon boats and other high-displacement hulls.

Q: How Much Does It Cost to Install a New Mercury 40HP?
A: Professional installation and rigging typically cost between $500 and $1,500, depending on the boat’s complexity and your dealer’s labor rates. This does not include the price of the required control cables and a propeller.


Conclusion and Next Steps

The Mercury 40HP outboard stands as a top-tier choice in its class, offering a compelling blend of proven power, commendable fuel efficiency and the backing of a vast service network. While the initial motor price falls between $7,500 and $9,500, it’s crucial to budget for the full “on-the-water” cost of $9,000 to $11,500+.

Whether you choose the nimble Standard model, the load-hauling BigFoot or the performance-oriented Pro XS, you’re investing in a piece of marine engineering built to last. For more information on outboard technology and maintenance, explore our guides at https://hidea-outboardmotor.com/outboard-maintenance.

A sleek Mercury 40HP Pro XS outboard mounted on the back of a bass boat, cutting through clean blue water with power and precision.

Ready to get a precise quote? Contact your local authorized Mercury Marine dealer for expert advice and the most accurate, up-to-date pricing and available promotions.

Download our free Outboard Buyer’s Checklist from https://hidea-outboardmotor.com/buyers-checklist before you visit the dealer to ensure you don’t miss any important questions.

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