Quick answer: The current Mercury Verado 300 is a 4.6-liter, naturally aspirated V8 sold since 2018. It has no supercharger, unlike the older inline-6 Verado 300. It weighs about 600 lb and comes in 20-, 25- and 30-inch shafts. Its reliability depends most on model year, how hard it runs and regular maintenance.
Mercury Marine sells its premium outboard line under the Verado name. The current lineup includes the 4.6L V8 (250 and 300 hp), the 5.7L V10 (350, 400 and 425 hp) and the 7.6L V12 (600 hp). The supercharged inline-6 Verado has been retired.
But people often ask whether the Verado 300 is reliable enough.
The short version: the V8 Verado 300 is a simpler engine than the model it replaced, and the most talked-about Verado problem, the supercharger, does not apply to it.
Let’s look at what the Verado 300 is, how the old and new versions differ, what to watch for and how it compares with other 300 hp outboards.
How Good Is the Mercury Verado 300?
The Mercury 300 hp Verado outboard uses a rock-solid V8 4.6-liter powerhead. That large engine size is the core of its power, acceleration and top speed.
Verado 300 models have class-leading displacement for their horsepower and include Mercury’s Advanced MidSection (AMS) and an under-cowl noise management system. Both are aimed at smooth, quiet running, which is what the Verado name is known for.
More displacement means the engine makes its power without being forced to work as hard. That is one reason Mercury dropped the supercharger when it moved the Verado 300 to a V8.
What Are the Mercury Verado 300 Specs and Weight?
The V8 Verado 300 weighs about 600 lb (272 kg). BoatTEST put that at roughly 68 lb lighter than the older supercharged L6 Verado 350.
| Spec | V8 Verado 300 (2018 onward) |
|---|---|
| Engine | 4.6-liter V8, naturally aspirated |
| Weight | About 600 lb (272 kg) |
| Shaft lengths | 20, 25 and 30 inches |
| Gear ratio | 1.85:1 or 1.75:1 |
| Gearcase | 5.4-inch, derived from the L6 Verado |
| Alternator | 115 amps |
| Multi-engine centers | 26 inches |
| Recommended fuel | Check the owner’s manual for your engine |
Specs come from Trade Only Today and BoatTEST. Always confirm the exact weight and fuel rating on the spec sheet for the model year you are buying.
What Is the Difference Between the V8 Verado and the Supercharged Inline-6 Verado?
There are two very different engines sold as the “Verado 300.” Which one you own or buy changes which problems you need to worry about.
- Older Verado 300 (inline-6): A supercharged inline-six. It was built before the V8 arrived and is now retired. Supercharger issues apply only to this engine.
- Current Verado 300 (V8, sold since 2018): A 4.6-liter V8 with no supercharger. It is lighter than the L6 Verado 350 and gets its power from displacement instead.
When Mercury launched the V8s, they replaced the L4 and L6 Verado and the 2.5L and 3.0L OptiMax at the same horsepower ratings. So a “300 hp Mercury” from before 2018 could be an L6 Verado or an OptiMax, not a V8.
Decision rule: If you are shopping used, ask for the serial number and model year first. Confirm whether the engine is a V8 or an inline-6 before you judge its condition or price.
Is the Mercury Verado 300 Durable and Reliable?
The V8 Verado 300 is built to be a lower-stress engine. It uses a large displacement and skips the supercharger. That removes a part that needed attention on the older inline-6 models.
The Verado line is made for bigger boats and offshore running. The heavy gearcase comes from the L6 Verado, and the 115-amp alternator helps big boats that run a lot of electronics.
The AMS and under-cowl noise management are there to cut vibration and noise. That makes long days on the water less tiring for the crew.
No outboard is reliable on its own, though. Reliability depends on the engine version, how it was rigged, how hard it runs and whether it got its scheduled service.
If you dock in tight spots, ask your dealer which steering and joystick options work with your rigging. These are add-on systems, so a used boat may or may not have them.
How Many Hours Will a Mercury Verado 300 Last?
There is no verified hour rating for the Verado 300 that we could confirm. Be careful with any single number you see online.
The real lifespan of any outboard depends on how hard you run it and how well you follow its maintenance schedule.
These factors matter most:
- Service history: Records of oil changes, gearcase lube and annual service are worth more than a low hour meter.
- Saltwater use: Engines run in salt need flushing after each trip and more corrosion checks.
- Load and RPM: An engine that is too small for its hull runs near wide-open throttle all day. That adds wear.
- Storage: Proper winterizing and fuel care prevent many problems.
What Maintenance Does a Verado 300 Need?
Follow the service schedule in your owner’s manual. It lists the exact hour and time intervals for your model year. Do not guess based on another engine.
Routine service on a large four-stroke outboard usually covers:
- Engine oil and oil filter changes.
- Gearcase lube changes and a check for water in the old lube.
- Fuel filter and water-separating filter changes.
- Water pump and cooling system checks.
- Anode and corrosion checks, especially in salt water.
- Battery, wiring and ground connection checks.
Tip: Keep every receipt. A full service record helps you catch problems early and raises resale value.
What Are the Common Problems With Mercury Verado Outboards?
The most important thing to know is which Verado you have. Problems linked to the older engine do not always carry over to the V8.
Supercharger issues apply only to the older supercharged inline-6 Verado, including the L6 Verado 300. The V8 Verado 300 sold since 2018 is naturally aspirated and has no supercharger.
If you own or plan to buy an L6 Verado, have a Mercury technician inspect the supercharger for leaks and wear.
On any Verado, watch for engine surging at higher RPM or engine temperature that rises and falls. These are signs to stop and have the engine checked.
Other areas worth checking on any large outboard include wiring and ground connections, the gearcase, the steering system and ignition parts. Loose or corroded grounds can cause electrical faults that look like bigger problems. Also remember that big outboards add weight to the transom, so check that your boat is rated for it.
Has Mercury Recalled the Verado 300?
We could not confirm any Verado 300 recall for this article. Older Mercury recalls that circulate online cover unrelated engines, such as older small outboards, OptiMax and EFI models. They do not tell you anything about the V8 Verado.
To check a specific engine:
- Find the serial number on the engine.
- Search the U.S. Coast Guard recall database for your model.
- Ask an authorized Mercury dealer to check for open recalls and service bulletins on that serial number.
Is the Mercury Verado 300 Still Being Made?
Yes. Mercury Marine is still producing the Verado 300 outboard. The current version is the 4.6L V8.
Above it, Mercury sells the 5.7L V10 Verado. On July 22, 2025, Mercury announced an all-new 425 hp V10 Verado and an enhanced 350 hp model. The V10 lineup now covers 350, 400 and 425 hp. At the top sits the 7.6L V12 Verado at 600 hp.
Where Are Mercury Verado Outboards Made?
Mercury Marine runs manufacturing facilities in more than one country to meet global demand for its outboards.
We could not verify which plant builds the Verado 300. Claims online that Verados come from a plant in China or Japan are not confirmed.
If country of origin matters to you, ask your Mercury dealer and check the labels on the engine itself.
How Much Does a Mercury Verado 300 Cost?
Prices change often and vary by dealer, so get written quotes instead of relying on a number from the web. Compare quotes on the same terms.
- Shaft length and gearing: 20-, 25- and 30-inch versions may be priced differently.
- Rigging: Controls, gauges, steering and wiring can add a lot to the engine-only price.
- Propeller: Check whether a prop is included.
- Install and old-engine removal: Ask for labor in writing.
- Twin setups: Pricing for a pair may differ from two single engines.
What Warranty Comes With a Verado 300?
Mercury sets warranty terms by engine and use, and they can change. Before you buy, ask the dealer for the current written warranty. Confirm these points:
- How long the factory coverage lasts for recreational use.
- Whether corrosion coverage is separate.
- What service records you must keep to stay covered.
- Whether any remaining warranty transfers on a used engine.
- Whether extended coverage is offered and what it costs.
Is the Mercury Verado 300 Better Than the Yamaha F300 or Suzuki DF300?
None of them is best for every boat. The right pick depends on your hull, your rigging and your local service options.
| What to compare | Why it matters |
|---|---|
| Dealer and service network | A great engine is a poor choice if no nearby shop can fix it. |
| Weight on the spec sheet | Extra transom weight affects trim, draft and how the boat sits at rest. |
| Displacement | The Verado 300 has class-leading displacement for its power class. |
| Rigging fit | Repowering with a new brand often means new controls, gauges and wiring. |
| Independent test data | Look up speed and fuel tests on a hull like yours, such as BoatTEST reports. |
| Written quotes and warranty | Compare full rigged price and coverage, not just list price. |
Decision rule: If your boat already has Mercury rigging, the Verado 300 is usually the simpler repower. If your boat is rigged for another brand, price the full switch before you decide.
Which Boats Is the Verado 300 a Good Fit For?
Use these checks before you buy:
- Check the capacity plate. Never go over your boat’s maximum horsepower or weight rating.
- Match the shaft to the transom. Measure your transom height and pick the 20-, 25- or 30-inch shaft that fits.
- Plan for twins or triples. The V8 Verado uses 26-inch centers for multi-engine setups. Confirm your transom has room.
- Count your electrical load. The 115-amp alternator helps boats with big electronics packages.
- Think about cruise RPM. An engine that fits the hull well should not need to run near full throttle to reach your cruise speed.
What Should You Check on a Used Verado 300?
A used Verado can be a good deal if you check it the right way.
- Confirm the version. A 2018-or-later V8 has no supercharger. An older inline-6 needs a supercharger check.
- Ask for service records. Missing records are a red flag.
- Get a dealer scan. A Mercury technician can read engine hours and stored faults.
- Check the gearcase lube. Milky lube or metal on the drain plug points to trouble.
- Look for corrosion. Check the midsection, mounts and electrical connections.
- Sea trial it. Watch for surging at high RPM, temperature swings and warning alarms.
- Run a recall check. Have a dealer look up the serial number.
Which Brands Are the Best Alternatives to the Mercury Verado 300?
If you want other options at 300 hp, the main alternatives are Yamaha, Suzuki and Honda. Evinrude is no longer an option for new engines. BRP stopped making Evinrude E-TEC and E-TEC G2 outboards in May 2020.
Final Thoughts
Mercury Marine is one of the biggest names in outboards, and the Verado is its premium line.
The V8 Verado 300 is built for smooth, quiet power from a large, naturally aspirated engine. If you buy new, compare full rigged quotes and warranty terms. If you buy used, confirm whether it is a V8 or an older supercharged inline-6, then check the service records before you pay.
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- Yamaha 150 Outboard Reviews: Are They Good and Reliable?
- Suzuki Outboards Reviews: Are They Good and Reliable?
Frequently Asked Questions
Does the Mercury Verado 300 have a supercharger?
It depends on the version. The current Verado 300, sold since 2018, is a 4.6-liter naturally aspirated V8 with no supercharger. The older Verado 300 was a supercharged inline-six, and Mercury has retired it. Supercharger problems apply only to that older engine, so confirm which version you have before you judge its condition.
How can I tell if a used Verado 300 is a V8 or an inline-6?
Ask for the serial number and model year first. Verado 300 engines from 2018 onward are 4.6-liter V8s. Older Verado 300s are supercharged inline-sixes. An authorized Mercury dealer can look up the serial number and also check engine hours, stored faults and any open recalls before you buy.
What shaft lengths does the Mercury Verado 300 come in?
The V8 Verado 300 comes in 20-, 25- and 30-inch shaft lengths. Measure your transom height to pick the right one. For twin or triple setups, the V8 Verado uses 26-inch centers, so confirm your transom has enough room before you buy.
Is the Verado 300 a good choice for boats with lots of electronics?
Yes, the V8 Verado 300 is built with that in mind. It has a 115-amp alternator, which helps bigger boats that run large electronics packages. Still, count your total electrical load. Check battery, wiring and ground connections too, because loose or corroded grounds can cause electrical faults.
Which Mercury engines did the V8 Verado replace?
The V8 outboards replaced the L4 and L6 Verado and the 2.5L and 3.0L OptiMax at the same horsepower ratings. So a 300 hp Mercury built before 2018 could be an L6 Verado or an OptiMax, not a V8. Check the serial number to know which engine you are looking at.
Is Evinrude still an alternative to the Mercury Verado 300?
No, not for new engines. BRP stopped making Evinrude E-TEC and E-TEC G2 outboards in May 2020. For a new 300 hp alternative, the main options are Yamaha, Suzuki and Honda. Compare dealer support, weight, rigging fit and full rigged quotes before you decide.
