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The mission of the Verado hp engine is to be a robust 4-stroke engine offering strong low-end torque, superior acceleration with reliability, low noise, smooth shifting and superior anti-corrosion protection needed in an offshore saltwater environment. And now, with the new 5.

Mercury's electronic boost pressure control, supercharged, intercooled system. The Mercury Verado is the only standard production, large volume supercharged outboard engine made. Because it is supercharged, this 2.

The unit is mechanically powered by the engine's crankshaft which makes it effective even at relatively low rpms. How Does it Work? It sucks air in from the atmosphere, compresses it with two ceramic-coated four-lobe rotors twisted degrees, then discharges it at the pressures needed to provide the performance wanted.

Since the supercharger compresses air at relatively low rpms it can provide superior acceleration from a standing stop.

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In this cutaway of a Verado engine, the actual vanes of the supercharger can be seen at right. Naturally-aspirated engines at sea level suck air into the combustion chambers at normal atmospheric pressure which is By adding a supercharger sometimes called a "compressor" or "blower" to the Verado engine, Mercury engineers were able to nearly double the pressure of air, to as much as 29 psi, going to the combustion chambers.

This is "pressure charging. In conjunction with the supercharger, there is also an intercooler, which reduces the temperature of the compressed air prior to entering the combustion chamber. This combination of compression and cooling puts much more oxygen in the cylinder for more powerful combustion. In addition, there is an Electronic Boost Pressure Control which helps to regulate the pressure regardless of temperature, pressure and altitude, delivering consistent performance with very little horsepower loss over a naturally aspirated design.

NOAA temperature map of the U. July and August are prime boating months for most of North America, Europe and the Med. As a result of this sophisticated system the Mercury Verado can deliver maximum horsepower in a wide range of conditions. That means that an engine rated at hp will have an effective horsepower of hp in those conditions. According to Mercury, the supercharged Verado HP loses about.

Map by the USGS showing altitude by color gradient. White lines are states and the black lines are rivers. Remedy for Altitude Sickness. Likewise, the thinner air at higher altitudes robs horsepower from all naturally aspirated engines.

Further, during the summertime even at high altitudes there is usually some humidity. Using the SAE standard of degrees F and In a nutshell this is how the Mercury Verado delivers hp from a smaller displacement engine. It is also what makes the Verado an ideal engine for geographic areas where the temperature rises above degrees F or where the air thins out because of altitude. But the story does not stop there.

For Strength and Durability. In these applications the new gear case can handle being run more aggressively, with the periodic ventilation that comes in rough sea conditions.

It provides increased effectiveness for the props when running at high speed offshore. The torpedo housing of the 5.

The shafts have longer taper for improved durability and added pinion gear support. This image shows the difference in size between the standard gear case shaft and pinion gears and the new 5. The bearing carrier for the 5. The bearings are heavy duty with a rear bearing pack with higher load capacity. The new, improved clutch dog has been changed in five major ways. Taken together Mercury techs tell us that they estimate that the 5. This is a conceptual representation showing the dichotomy between the amount of copper used in the Mercury XK aluminum alloy and the amount of copper used in a typical outboard engine.

Mercury Marine has developed what is generally considered to be the industry's most effective alloy at resisting corrosion in a saltwater environment.

But there is more to Mercury's anti-corrosion system than a patented alloy. A number of strategies, materials and devices work together to reduce corrosion problems.

In the words of one of Mercury's officials, "Saltwater corrosion is no longer an issue. Historically outboard engines in saltwater have suffered from corrosion. When electrons flow through dissimilar metals the weaker metal is eaten away or corrodes.

Outboard engine blocks, cylinder heads, gear cases, drive shaft housings and swivel brackets are made out of an aluminum alloy by all manufacturers. But all aluminum alloys are not the same. Low-Copper Alloy is Key. The low copper content aluminum alloy used in the Mercury Verado 's die-cast components such as, gear cases, and drive shaft housings are all made from XK aluminium-silicon alloy, while the block and heads are of a A low pressurized lost foam casting.

Mercury is one of the three manufacturers in the world who utilize this process. Mercury is generally regarded to have the best corrosion-resistant alloy in the recreational marine industry.

The MercFusion Paint System. Having made the metal more corrosion-resistant, Mercury has developed its own process of coating the metal to keep saltwater from touching it in the first place. The photos below illustrate the measures taken and the materials used. The "MercFusion" paint system. The MercFusion paint process consists of a Irridite metal prep and sealant that goes over the aluminum alloy and provides a resistant barrier and a foundation for the two materials that come on top of it.

Next the units are dipped in EDP electrically-charged primer that provides complete coverage and seals out the environment from the metal. The gear case torpedo units are bathed in Irridite, a chromate conversion coating typically used on aluminum substrate parts in the aircraft industry. This sealant is used to be a passivate for the aluminum, copper and manganese in the housing alloy as well as to be a primer.

The units are then put through what is called the EDP process. The electrically charged paint and oppositely charged components create uniform coverage that seals out the environment.

Powder coat paint is the top coat and it contains plasticizers for paint flexibility and better long-term adhesion. It is sprayed on and then thermo-cured. Mercury is the only outboard maker using powder coated paint on its metal lower units. Robots spray the housings with powder coating material which is electro-statically charged for adhesion. Finally the gear case housings are sent through an oven that bakes on the powder coat for hardness.

Only Mercury coats the interior water-cooling passages in the powerhead and its wet exhaust passageways with a special "salt shield" that protects the internal metal from the ravages of saltwater. Unique Internal "Salt Shield" -- "SS38".

Every owner of an outboard engine used in saltwater knows to flush out the cooling system at the end of the latest no deposit forex bonus 2016 with fresh water. The reason is that salt build-up can close small passages and corrode the metal where it can't be seen.

Mercury uses an internal sealing process along with a special coating in the internal water jackets of the powerhead and wet exhaust. Mercury is the only outboard engine maker november stock market lowyat know of that flushes the powerhead wet exhaust using a process such as this.

Mercury Verado has More Stainless Steel. Stainless steel alloys resist corrosion, maintain their strength at high temperatures and are easy to maintain.

Stainless steel alloys are used predominantly in the automotive, aerospace and construction industries. But all stainless steel alloys are not the same. Only Series stainless steel is used in Verados. It is used in props, shift shafts, drive shafts, trim and tilt rams, lower yoke, water pump housing and other components. To our knowledge no outboard okc west livestock auction tornado uses more or better stainless steel in this engine class.

Some outboard manufacturers use Series stainless steel which does not have as high a degree of corrosion-resistant properties as does Series, but is suitable for household decorative items, appliances, among other things.

Mercury's "Advanced Mid-Section" AMS for the Verado HP engine has four elastomeric mounts that virtually eliminate vibration from being transmitted to the hull. Three of the four mounting units can be seen in the image above. All powerheads, no matter, how well designed cause vibration. The question is what to do about it. Mercury has designed what it calls the "Advanced Mid-Section" AMS to virtually eliminate annoying vibration and the noise that comes with it.

The powerhead is connected to options and derivatives trading live oversized, calibrated, elastomeric mounts which are designed to isolate and cancel vibrations.

The mounts in turn are connected to the cradle which is attached to the outboard engine bracket. The bracket is clamped to the transom. When the engine is at idle or low rpms, the mounts are soft, but as rpms increase the variable-rate list of asx companies by market capitalisation become progressively harder. In both cases the vibration is isolated in the cradle and very little of it is transmitted to the boat.

The result is a smoother riding, quieter boat. The cradle-mount AMS unit seen above sets the engine powerhead 5" behind the transom which aids time-to-plane speeds and smoother running. A cylindrical "bucket shim" can be seen here in the tech's right hand. His left hand is holding a valve stem.

The shim fits between the valve stem and the lobe on the cam shaft, moving the valve open and closed as the cam shaft rotates. Importance of Shim Clearance. Six-cylinder DOHC engines including all hp marine 4-stroke outboards have 24 valves forex ea generator 2 24 valve shims and all must be at optimum clearance or "lash" for best performance.

Typically before hours of use the lash between the cam lobe, valve shim, and the top of the valve stem changes. Symptoms of the lash getting out of spec are using oil, loss of performance, increased noise, or a slightly indian share market charting software engine noise.

Most manufacturers recommended adjusting the valve lash -- re-shimming -- stock market fannie mae a certain number of hours. It is not surprising that many people put off this "tune-up" as long as possible. This "regular maintenance" is not covered by warranties and is often needed after the engine is out wot best money maker tier 5 warranty.

Re-shimming is a time-consuming and tedious job. The clearances of each valve shim must be carefully measured and new shims of the right thickness inserted where needed. Guaranteed Valve Train Lash for Life. As far as we know, the Mercury Verados are the only outboards that do not need to be re-shimmed. Their valve shim nishant trading system afl is guaranteed for the life of the engine.

Here's why Mercury can offer this money-saving benefit The arrows point to the "long bolts" in the cut-away Verado block that ties the powerhead to the bottom of the block and keeps the assembly in a constant state of tension.

Pictured here is the head of a Verado engine, showing the "buckets" and 10 cylindrical stainless steel shims already in place. A computer reads the clearance needed for each shim and one of 35 different sizes is selected for each bucket victoria secret stock market symbol placed in it by hand.

See the Mercury video of the manufacturing process. Computer Technology for Clearance Calibration. Mercury shim tolerances range from. The correct shim is then placed in the powerhead by hand, followed by a second computer check of the calibration.

Mercury valve train with dual overhead cams. When a problem is detected either a visual or audible alert is sent to the instrument ufx forex romania and engine power is automatically reduced, advising of a concern and providing a get-home capability.

When designing the in-line 6 Verado outboards -- and hp models -- Mercury engineers decided to create an engine that would be more durable than anything else on the market.

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They also wanted an engine that could have peak performance on hot, humid summer days when most people use their boats. Further, they wanted to address the problems that boaters historically have had at high altitudes with sluggish engines. A Better Mouse Trap. In order to do all of that, obviously Mercury could not simply replicate conventional outboard 4-stroke design and expect anything much different to be the result.

It had to engineer a completely different approach to a high-horsepower outboard engine. At the same time, Mercury engineers naturally wanted to create an engine with reduced vibration, noise, emissions and fuel consumption.

Using conventional 4-stroke technology as the benchmark, Mercury engineers set to work to improve upon existing products. The result was the Verado, an engine introduced in that 10/22 stock for sale up having other advantages as well, such as more low-end torque and a "maintenance-free-for-life" valve train.

What follows is an in-depth look at what, in our opinion, is one of the most sophisticated outboard engines on the market. The Verado Series is designed for both superior performance on hot, humid summer days, at altitude and also a long, useful life. We have tested the Mercury Verado hp engine several times in a single, twin and triple configurations, and in differing types of boats.

Test results of the hp Mercury Verado in a Nitro ZV21 tournament fishing boat. Here we have a top speed of At that speed we measured a fuel burn of Best cruise came in at rpm and 31 mph.

That speed reduced the fuel burn to 9. Those are pretty impressive numbers but how about for larger boats? The Vantage weighed in at 4, lbs.

The Outrage weighed 9, lbs. This boat burned The Outrage weighed 16, lbs. Prop geometry was not available at the test site. Fuel burn was Test Results for a Boston Whaler Outrage Powered by Twin Mercury hp Verados. On the Vantage, best cruise was at rpm pushing us along at Best cruise for the Outrage was recorded at rpm at a speed of Boats create different wind and water noises at the same speeds and the decibel meter is not able to distinguish engine noise from wind and water sounds.

Also, the harmonics of boats are all different, even among the same model to some degree. In other words, the same engine placed on two different boats will likely have two different sound readings at any given speed or rpm.

With that as a caveat, our sound tests of the three boats powered by Verado hp engines fall within OSHA industrial guidelines. At idle, our readings for both single and twin Mercury s were in the low to mid 60s dbA, which is remarkably quiet. We captured what appears to be an anomalous reading at idle for the triple installation which dropped to 69 for rpm which was consistent with the other two tests. Incidentally, two engines are not twice as noisy as one, nor are three engines triple the noise level of one.

Another item is the Verado multi-chambered intake sound attenuator, where the air entering the engine is ducted through specially-shaped and sized chambers to reduce overall noise. The company has also applied acoustic foam lining along the upper cowling and lower cowl to absorb high frequency noise from the engine and drive shaft. The hp Verado carries a standard 3-year limited warranty, which is non-declining.

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Certain boat brands and we assume all Brunswick-owned companies which "have met the requirements for the Mercury Installation Quality Certification Program carry an additional year of warranty on the engine," according to the company. That means a 4-year top-to-bottom warranty. This warranty also extends to the controls and rigging when installed by a factory-authorized builder. In addition, there is a total of 6 years of anti-corrosion warranty as mentioned above. Copying or re-using any of the material, in whole or in part, on this site, including data, photos, articles and videos is strictly forbidden without the written permission of BoatTEST.

Mercury Verado HP Send to a Friend. Mercury Verado HP Main Video. Mercury Re Power Tips. Mercury Joystick Piloting Review. Mercury - Verado Supercharger Promo. Mercury - Shaw Grigsby Shallow Run.

Mercury - Prop Selection. Mercury Joystick Piloting for Outboards. Overview Boats Tested with this Mercury Verado HP Text Size: Mercury Verado HP Captain's Report Mission The mission of the Verado hp engine is to be a robust 4-stroke engine offering strong low-end torque, superior acceleration with reliability, low noise, smooth shifting and superior anti-corrosion protection needed in an offshore saltwater environment. Distinguishing Features Mercury's electronic boost pressure control, supercharged, intercooled system.

Other Advantages of Supercharging Summer Temperature Map NOAA temperature map of the U. This makes the Verado an ideal engine to have during the summer when ambient temperatures can reach and exceed degrees F degrees C.

Altitude Map Map by the USGS showing altitude by color gradient. The Verado hp is offered with a choice of two different gear cases, each designed for specific applications. The fine profile of the gear case and torpedo make it fast. The slightly greater drag presented by the larger torpedo shape on the new 5. In these conditions there are tremendous stresses on the engine's gear case and it has been designed with strengthened internal components, built specifically for offshore boats over 23' 7.

Old Clutch Dog The new, improved clutch dog has been changed in five major ways. Mercury's Advanced Mid-Section All powerheads, no matter, how well designed cause vibration.

Here's why Mercury can offer this money-saving benefit-- The arrows point to the "long bolts" in the cut-away Verado block that ties the powerhead to the bottom of the block and keeps the assembly in a constant state of tension. Why Verado Is Different When designing the in-line 6 Verado outboards -- and hp models -- Mercury engineers decided to create an engine that would be more durable than anything else on the market.

Built for Saltwater Applications. The engine is intended for both freshwater and saltwater use. However, the recent introduction of the new optional 5. There is nothing quite like it on the market. The new gear case together with its advanced anti-corrosion aluminum alloy and painting regimen, and extensive use of Series stainless steel, arguably makes it the best-prepared engine for the saltwater environment. Performance Numbers We have tested the Mercury Verado hp engine several times in a single, twin and triple configurations, and in differing types of boats.

WOT Speeds-- Single Test of Boston Whaler Vantage with a Single Mercury hp Verado Test Results for a Boston Whaler Outrage Powered by Twin Mercury hp Verados Test of a Boston Whaler Outrage powered by Triple Mercury hp Verados Best Cruise Speeds Single Mercury has engineered this engine to reduce sound and vibration.

One example of this effort is the exhaust relief system which is designed to reduce sound at idle.

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Warranty The hp Verado carries a standard 3-year limited warranty, which is non-declining. Boats Tested with this Mercury Verado HP Nitro ZV 21 Boston Whaler Vantage Sea Ray Sundeck Outboard Sea Ray Sundeck OB Boston Whaler Outrage Mako CC Boston Whaler Conquest Sailfish CC Boston Whaler Outrage Intrepid Boats Cuddy Sailfish DC Boston Whaler Outrage Sea Ray SLX OB Boston Whaler Conquest Boston Whaler Outrage Intrepid Boats Center Console Sea Ray Venture Get FREE Access to Videos, Reports, Newsletters!

About Us Contact Us Advertising Site Help Terms of Use Privacy Policy Copying or re-using any of the material, in whole or in part, on this site, including data, photos, articles and videos is strictly forbidden without the written permission of BoatTEST. Nitro ZV 21 Boston Whaler Vantage Sea Ray Sundeck Outboard Sea Ray Sundeck OB Boston Whaler Outrage Mako CC Boston Whaler Conquest Intrepid Boats Cuddy Sea Ray SLX OB Intrepid Boats Center Console Sea Ray Venture