Electric Outboard Motor vs Gas - What Buyers Should Know
TL;DR: Electric outboards win on quiet running, instant torque, and near-zero maintenance. Gas FourStroke EFI engines win on range, fast refuelling, and a lower upfront cost. The right choice comes down to how far you run, where you boat, and whether silence matters more to you than range.
Key Takeaways
- Electric and gas Mercury outboards do the same job two ways, and Mercury rates electric power at the prop shaft, not in horsepower.
- Electric pulls ahead on quiet running, instant torque, light maintenance, zero direct emissions, and access to electric-only lakes.
- Gas still wins on long-range runs, minutes-fast refuelling, lower upfront cost, and proven all-day trolling.
- Your boat, your run length, and your home waters decide the winner, and both come backed by Mercury's dealer network.
How Do Electric and Gas Outboards Differ?
Fuel tank or battery: the core difference
Both kinds of outboard push your boat. They just get there differently. A gas outboard burns fuel through a FourStroke EFI engine, so you top up in minutes and run as long as you've got fuel aboard. An electric outboard runs off a lithium-ion battery, so the power is smooth and near-silent, and you recharge between trips.
There's a handy bonus with electric, too. No warm-up and no choke, so you switch it on and go.
How the power ratings line up
Here's the part that trips people up. Mercury rates its Avator electric outboards at the prop shaft in watts, not horsepower. The 7.5e puts out 750 watts, and Mercury says it accelerates a small boat about like a 3.5hp gas FourStroke. The 20e lines up with a 5hp, and the 35e with a 9.9hp.
Just remember those are acceleration comparisons, not a straight horsepower swap. An electric motor delivers its pull differently than a combustion engine does.
Where Electric Outboards Pull Ahead
Quiet enough to keep talking
Quiet is the big one. Mercury's testing shows the 35e runs about 63 percent quieter than a 6hp FourStroke at full throttle. The 7.5e is four times quieter to the operator than a 3.5hp FourStroke. Out on the water, that means you can hold a conversation, and you're far less likely to spook the fish.
Instant torque, almost no upkeep
Electric motors hand you full torque the moment you touch the throttle, so the boat jumps off the line. Upkeep is light, too, with no oil to change and no fuel system to fuss over.
Most of the maintenance comes down to a few simple checks:
- the anode
- a little grease on the prop shaft
- a rinse after saltwater
- keeping the battery charged
Cleaner storage and quiet-water access
No fumes and zero direct emissions mean the motor stores cleanly at home, with no fuel to babysit. And on models with the SmartCraft Connect module, the Mercury app shows live range estimates as you run.
Electric also gets you onto water that gas can't. Some BC lakes restrict or ban gas motors, so an electric outboard is your ticket to those quiet, electric-only spots.
Pro Tip: Match your battery to a typical run first, then carry a spare for the longer days. On the 20e and 35e, up to four batteries link through the Power Center to stretch your range. That way you scale power without buying more motor than you need.
Where Gas Outboards Still Win
Range and quick refuelling
This is gas's home turf. You can top up in minutes at any fuel dock or from a jerry can, while a battery needs time on the charger. A flat Avator 2300Wh battery takes about 10 hours on the 230W charger, and the faster 520W charger cuts that by more than half. For long days or remote trips with nowhere to plug in, gas still has the edge.
Lower upfront cost, proven and simple
Gas FourStroke EFI engines cost less to buy up front. They run battery-free EFI, so they start reliably without a separate cranking battery, even when it's cold or damp. The fuel and service network is everywhere, which keeps a gas outboard easy to live with all season.
Built to troll all day
If you fish, the gas ProKicker was made for trolling. It teams a Command Thrust gearcase with a four-blade, high-thrust prop tuned for slow-speed control. That combination holds a steady troll all day on one tank, which is tough to beat on a long fishing trip.
Pro Tip: A kicker's whole job is slow-speed control. Electric gives you near-silent trolling, and a gas ProKicker gives you all-day range on battery-free EFI. Pick the one that suits your typical trip, not just the spec sheet.
Which Outboard Fits Your Boating?
Start with how far and where you run
Begin with distance. Short hops, day trips, and small water suit electric, while long runs with no charging point to gas. Then think about where you boat. Quiet or electric-only lakes lean electric, and open or remote water leans gas.
Match it to your boat, then your priorities
Your boat narrows things down fast. Tenders, dinghies, jon boats, inflatables, and light aluminum V-hulls all pair nicely with either kind, and electric feels right at home on lighter hulls. Bigger or faster boats usually want the range and muscle of gas.
After that, it comes down to what you value most:
- Want silence, clean storage, and low maintenance? Go electric.
- Want range, fast refuelling, and a lower upfront cost? Go gas.
One more thing on timing. Right now, Avator electric outboards carry a 5-year promotional warranty through August 31, 2026, and then coverage returns to the standard 3 years.
Coming from gas? The switch is easier than it looks
If you've run gas your whole life, electric will feel different, but it's not hard to pick up. The throttle is simple, and there's no fuel to mix or store. Electric also trades a higher upfront cost for lower running and maintenance costs over time.
Whichever way you lean, both gas and electric Mercury outboards come backed by the same dealer network and Mercury factory warranty.
Still Deciding?
The best outboard is the one that fits your boat and how you actually use it. Talk it through with the Mercury Outboards team at 1-807-206-0032. Or try our Outboard Finder to match an engine to your boat and your usual day on the water.
