When deciding between Yamaha 425 and Mercury 450R, most people love to choose Mercury 450R because it doesn’t make a loud noise as Yamaha 425 does. Although Yamaha 425 is more in power and longer working, it is not suggested to use if you are a peace lover, even in the water.
Another reason to choose Mercury 450R is that it has a better fuel economy than Yamaha 425. But these are not the only differences you can find with these engines. Explore the article to find out more.
A Quick Comparison Table
| Specifications | Yamaha 425 | Mercury 450 |
| Usage | Larger Off Shore Boats | Heavy Duty Off Shore Boats |
| Fueling Capacity | 5.6 liter V8 | 4.6 Liter V8+ |
| Engine Specification | Four Stroke | Four Stroke |
| Starter System | Electric | SmartStart Electric |
| Bore And Stroke | 96.0 x 96.0 | 3.6 x 3.4 IN/92 x 86 MM |
| Sound Or Noise | Louder | Calmer |
| Country Made | Japan | USA |
| Warranty | 5 Years | 3 Years |
| Pricing | Anywhere between $110,000 to $125,000 | Anywhere between $54,000 to $64,000 |
Key Differences Between Yamaha 425 And Mercury 450 Boat Engines
- Usage
Comparing both engines with their applications doesn’t seem fit because both give your boat the power it needs to survive in the water.
Depending on your budget, likes, configuration, and environment, you can fix a Yamaha 425 on your offshore or heavy boat or have a Mercury 450.
But that doesn’t seem fit to choose any of these if you don’t know the basic comparison between these boat engines.
- Fueling Capacity
On fueling capacity, Yamaha 425 needs 5.6 liters to run over its V8 engine. It usually consumes more fuel than a 450 Mercury model.
On the other hand, Mercury gives you better fuel economy and saves you money while having only 4.6 liters of fuel for its V8+ engine.
Give your boat the power and tremendous force it needs to drive through the tough water and reach the second bank of the sea or river.
Also Read: Differences Between Jeanneau 409 And 419 Sailboat.
- Engine Specification
On the engine side, Mercury is supported and boosted by a highly Racing Supercharger Four Stroke Power engine that gives your boat a power of 450 peak horsepower.
This engine is considered 40 percent more powerful and with better torque than the powerful 400R engines from Mercury.
On the other hand, when this engine is compared with the Yamaha 425, you get a four Stroke engine with direct injection.
It comes with an Award Winning 5.6 L V8 power engine that delivers 425 horsepower speed to make your boat run faster. However, the engine is a little less powerful than Mercury, but it gives you the most bang for your buck for the price you would pay.
- Starter System
It’s pretty easy to start these engines because both have installed the same faster and quicker electrical engine starting system.
You need to push the button, and your engine will be ready to work with your boat.
- Bore And Stroke
Both engines have different types of cylinders with other specifications or measurements of bore and stroke.
When it comes to Mercury, you can have a bore and stroke dimension of 3.6 x 3.4 IN/92 x 86 MM.
And that is something more than the dimensions of the Yamaha engine.
With Yamaha 425, you get the bore and stroke dimensions of 96.0 x 96.0 mm, which is also not bad to provide more space for dissipating the engine smoke or air.
- Sound Or Noise
Many customers who have purchased and used Yamaha 425 are pretty unsatisfied with this engine’s too much noise.
It can be louder while being in the water. If you don’t like an engine producing so much noise, you may want to opt for that option and consider something else.
However, people have also compared Mercury 450 with this Yamaha engine and stated that Mercury is more eco-friendly because it produces less noise than the former.
- Country Made
You will truly like your home country’s products more than those imported from another country.
Many people get addicted to using Mercury 450 because it is a USA-made boat engine. With this, you are sure that it is manufactured in your home ground and you will feel happy while taking benefits from it.
The happiness comes from seeing your country providing such a fantastic boat engine that could fly away your boat.
On the other hand, Yamaha 450 engines are fully imported from Japan because these are manufactured over there.
However, Japan has a high name for providing quality products worldwide that runs for years without any complaints.
- Warranty
One of the best things you can get by spending time, energy, and effort is a free return policy when you have encountered a fault or don’t like the product.
You can replace the engine within a specific period and get new or have free maintenance if something happens.
For that, Yamaha gives you up to 5 years of limited lifetime warranty over its Yamaha 425 engine.
And when Mercury is focused, it gives you up to 3 years of a limited lifetime warranty on the 450hp model.
- Pricing
While buying a boat engine for your new or old boat, you do have to be limited within your budget.
So, if you purchase your country-made boat engine named Mercury 450, you can have it for 50,000 to 60,000 bucks. But buying Yamaha 425 is way expensive because of its high price range.
This price range of $110,000 to $125,000 is because of import taxes, duties, and other local taxes as these boat engines come into your country.
Which Boat Engine Is Better For You?
The decision to buy something like this always comes to you as to what you prefer for your boat.
Suppose you want an outboard with less noise, more fuel economy, and a cheaper price range. In that case, you should consider Mercury 450 HP outboard with its four-stroke engine power. Here is a good explainer video of it.
But Yamaha 425 is also not bad because of its 5 years of exceptional warranty and Japan-made configuration. Anyway, the choice will always be yours.
Also Read: Differences Between Catalina 320 And Beneteau 323 Cruiser Boats.
Frequently Asked Questions (FAQ)
Mercury Outboard ensures the best fuel economy, has a lower price range, is made in the USA, and produces less noise than Yamaha. So, Mercury is always better.
When Yamaha 425 V8 XTO was tested, it delivered a total horsepower of 850 hp. Its 3,900 kg weight is always commensurate with the power it delivers. In a test, it appeared with a remarkable performance.
A Mercury 450 with a total horsepower of 2700 hp can easily manage to go at 100 mph. It is based on a dedicated V8 design and holds the ability to run faster than a 400R model.
The maximum price for these engines is around $125,000 each, and the minimum is $110,000. Therefore, you must have this sum of money if your intentions go for a Yamaha 425 model.
Final Thoughts
Conclusively, we can say that in the comparison between Yamaha 425 and Mercury 450R, Mercury 450R has higher votes. It doesn’t produce too much noise as Yamaha 425 does. It has better fuel economy.
The outboard is cheaper and made official in the United States Of America, and what else do you need with such extreme power? However, let me know if you still have queries to ask. Thanks for being here.
Have a sea day!
