Torqeedo Travel VS Mercury 3.5 HP: Which is cheaper in the long run?

The Torqeedo Travel has been the gold standard for portable electric outboards for over 20 years. But when you're staring at a $2,148 price difference at the register, it's fair to ask whether it's actually worth it.

The Torqeedo Travel costs $3,398 as a package. A Mercury 3.5hp runs $1,250. That gap is real and we're not going to gloss over it. But the purchase price is just the opening bid — what you spend over the life of the motor is a completely different number.

We ran the full cost model over 12 years, line by line. Here's what we found.

The Two Motors

Torqeedo Travel  ($3,398 package) — 1.1kW / 3hp electric outboard from the company that invented the portable electric outboard. Built-in tiller, cable-free battery connection, GPS-based range display, Bluetooth connectivity, and four tilt positions. The 1,080Wh battery gives about one hour of run time at full throttle. No oil, no winterization, no impeller, no pull cord. Weighs about 45 pounds, but the motor (26 pounds) and battery (19 pounds) can be handled separately. Made in Germany.

Mercury 3.5hp ($1,250) — Four-stroke, water-cooled gas outboard. Compact, widely available, and backed by one of the largest dealer networks in the marine industry. Like the Mercury 5hp, it has a cooling system with an impeller that requires periodic attention. Weighs around 41 lbs — lighter total weight than the Torqeedo, but more to handle at once.

This is one of the most common comparisons we see in the 3hp class. They're closely matched in power output and the use cases overlap significantly: dinghy tenders, small sailboats, inflatables, and lightweight fishing boats.

What We're Counting

Every number below is grounded in real costs — not optimistic estimates designed to make electric look better than it is.

Shared assumptions:

• 25 hours of use per year at full throttle
• National average gas price: $3.10/gallon (2025 EIA average)
• National average electricity rate: $0.18/kWh (2026 EIA data)

Mercury 3.5hp annual and periodic costs:

• Fuel: ~$29/year (25 hrs × 0.37 GPH × $3.10)
• Winterization: $175/year — the Mercury 3.5hp is water-cooled, so there's a full flush and fogging procedure every fall. We're counting the shop cost, not a DIY estimate.
• Miscellaneous repairs: $75/year — fuel lines, carb issues, props, tune-ups. Gas engines that sit all winter have a way of surprising you every spring.
• Scheduled service + impeller replacement: $375 every 4 years — oil, spark plug, gear oil, shop labor, and impeller. Yes, the Mercury 3.5hp has an impeller. It's water-cooled. At 25 hours per year, we've modeled replacement every 4 years on a calendar basis.

Torqeedo Travel periodic costs:

• Electricity: ~$5/year (25 charges × 1.080 kWh × $0.18)
• Maintenance: $0/year — no oil, no plugs, no winterization, no impeller
• Anode + prop replacement: $228 ($79 + $149) at years 5 and 10 — zinc anodes protect the motor from corrosion, especially in saltwater. Props can break or get chewed up. Both are real costs but infrequent.
• Battery replacement at year 7: $1,599 — the Travel battery is fully user-replaceable, so when it eventually degrades you're buying a new battery, not a new motor. We've modeled this conservatively at year 7; with proper storage and light seasonal use, it could realistically last 10 years or more.

The Numbers

This comparison follows a familiar pattern. The Torqeedo Travel  starts well above the Mercury due to purchase price, but its running costs are so low that the Mercury catches up and eventually crosses over. The crossover point — where total ownership cost flips in the Travel's favor — happens somewhere around year 9 or 10 depending on your gas price and usage, and the gap widens from there. If your battery lasts 9 years, the Torqeedo becomes cheaper in year 8.

The battery replacement at year 7 is the most visible bump in the Travel line. It's a real cost and we've made no effort to hide it. But notice what happens after: the Travel line barely moves for the remainder of the period, while the Mercury keeps climbing steadily. That's the structural advantage of electric — once you've absorbed the big upfront costs, the ongoing expense is essentially zero.

The Honest Caveats

We try to build these comparisons so that a skeptical reader can find fault with them — and can't. Here's what we think is worth flagging.

The battery replacement year is a variable. We modeled year 7 conservatively. At 25 hours per year, you're doing roughly 25 charge cycles annually. The Travel battery is rated for hundreds of cycles, and calendar aging is the more likely limiting factor for a seasonal user. If the battery makes it to year 9 or 10 — which is entirely realistic — the Travel's 12-year cost advantage grows considerably. Use the interactive calculator below to see how the numbers shift when you move the battery replacement year.

The Mercury has the better service network. If something goes wrong with a Mercury 3.5hp, you can find a mechanic at virtually any marina in the country. Torqeedo's dealer network, while growing, isn't there yet (although we expect this to change relatively quickly, as Torqeedo was purchased by Yamaha in 2024). For most boaters this is a non-issue since electric outboards have very few failure points — but it's worth acknowledging.

Gas prices do matter here. At 0.37 GPH the Mercury is efficient for a gas motor, but it still burns fuel every hour. If you're in California or the Northeast paying $4.50+ per gallon, the Mercury's annual fuel cost goes up meaningfully and the crossover point moves earlier. Use the sliders below to enter your local prices.

25 hours per year is conservative. The more you use the motor, the faster the electric advantage compounds. Every additional hour on the water is more fuel you didn't buy, more wear on the Mercury's cooling system, and another charge at essentially zero cost on the Travel side. If you boat more than 25 hours a year — which many people do — the numbers shift further in the Travel S's favor.

The Mercury is more powerful. It's a 3.5hp motor and the Travel is a 3hp equivalent. We used it because there aren't really any 3hp gas outboards on the market (although there are some 2.5hp outboards). The Mercury will outperform the Travel in top speed and range, but the Travel has more torque and will be more efficient at lower speeds.

What This Tells You

The Torqeedo Travel is not the cheapest motor to buy. It's the cheapest motor to own — if you keep it long enough.

By year 12, the Travel comes out ahead under national average assumptions. And that's before you assign any value to everything the spreadsheet can't capture.

You're not dealing with gas anymore. No jerry can to haul, no smell on your hands, no trying to figure out if you have enough fuel for the season. You plug it in, you charge it, you go.

Push button start, every time. No choke, no priming, no yanking a cord on a cold morning while your crew watches. The Travel S starts instantly, every time, regardless of how long it's been sitting.

No more annual marina runs. Every fall with a gas outboard you're scheduling a winterization appointment, dropping it off, picking it up, paying for it. With the Travel, you store the battery at around 50% charge, check it every three months over the winter, rinse the motor with fresh water after saltwater use, and you're done. That's it. That's the whole winterization routine.

No impeller to worry about. The Travel's cooling system is passive; the motor being submerged is enough to keep it cool. There's nothing in the Travel that wears the way a water-cooled gas engine wears, which means fewer surprises and fewer unplanned shop visits.

It's cleaner on the water you love. No fuel getting into the water, no exhaust fumes, no emissions. If you're on a quiet lake, a protected harbor, or an area with restrictions on combustion engines — electric is simply the better choice, full stop.

The cost analysis we've run is honest, and it's not a blowout. But it does show that a boater who keeps the Travel for a decade or more ends up spending less and dealing with less than the Mercury owner. That combination is hard to argue with.

Questions?

If you want to talk through whether the Torqeedo Travel is the right fit for your boat, give us a call at 631-204-8188 or email luke@emoelectric.co. We'll give you a straight answer — including if we think a different motor might suit you better.

Methodology: Cost projections assume 25 hours of use per year at full throttle. Gas priced at $3.10/gallon (2025 EIA national average). Electricity priced at $0.18/kWh (2026 EIA national average). Mercury 3.5hp costs include $175/year winterization, $75/year miscellaneous repairs, and combined service + impeller replacement of $375 every 4 years. Torqeedo Travel S costs include electricity at approximately $5/year, anode and prop replacements of $228 at years 5 and 10, and a battery replacement of $1,599 at year 7. Prices are not inflation-adjusted.