Volvo Penta Duo Props Type C work with drives numbered both DP280 and CP290. All Type C Penta duo props are fashioned from stainless steel, which as experienced boaters know, has several significant advantages. Stainless steel is resistant to corrosion, meaning that rust issues will be reduced. In addition, stainless steel is a strong metal – this helps the blades on the duo prop to resist all sorts of damage from warping to scratches. These duo props are engineered to produce maximum thrust when speeds exceed 40 knots, making them an ideal choice for boating enthusiasts desiring a high performance, state-of-the-art propulsion system.
Volvo Duo Props Type C produce this outstanding performance in part because they have been engineered to have blades that are thinner than is typical of many other propeller systems. The stainless steel allows for large levels of torsional strength even at very high accelerations. Stainless steel also means that the units are resistant to the various kinds of damage that can be caused by cavitation. In addition, the stainless steel of these props gives them a clean, gleaming look that will be an asset to any type of boat. They not only consist of quality materials – they look like it.
Type C Volvo Duo Props also come with Volvo’s excellent warranty so that customers can feel assured that they will be able to enjoy a quality boating experience for many years to come.
Many boat propeller systems have blades made out of either aluminum or stainless steel. There are also more options available that may be more appropriate for some propulsion systems. Volvo Duo Prop Type G is made of Nibral, a term which refers to an alloy of nickel, aluminum, and bronze. Bronze is an alloy in and of itself, consisting mainly of copper, with other metals such as tin present in smaller amounts.
Volvo Duo Props Type G have been specially engineered and designed so that they will work well with the D4 as well as the D6 engine, both of which produce a stupendous amount of power coupled with significant torque as well. Not every propeller can withstand the forces generated by these powerful engines, but Series G in the Volvo Penta duo props line is fully up to the task.
Characteristics of Nibral
Volvo Duo Props Type G Nibral is an excellent material to use in boating applications because one of its key characteristics is outstanding resistance to corrosion. This alloy of nickel, bronze, and aluminum also allows for full isolation of electrical charges so that no growth of them is possible. This feature also adds to the corrosion resistance capabilities of the blades.
Like all Volvo Penta duo props, the Type G line is backed by a warranty that demonstrates the faith that the Volvo Penta company has in their line of fine boating products. Such a warranty is important so that customers know they are purchasing a quality product.
When people think of boat motors, they generally think first of the outboard motors that power many ski and fishing boats. Propellers used on these motors are called outboard propellers or outboard props. Boating enthusiasts have several choices to select from when it comes to propellers for outboard motors.
Some of the more popular outboard propellers include Apollo propellers. These are manufactured out of stainless steel by the Michigan Wheel company, which has been making replacement boat propellers for over a century.
Ballistic Boat Props by Michigan Wheel
Another popular choice also manufactured by the same company is the Ballistic boat prop. These are made from stainless steel and are designed to shine with a high-gloss finish that resembles the surface of a mirror. The Ballistic prop line is engineered to have blades that are resistant to damage such as nicks along their edges; the blades also resist the tendency to bend. This means years of reliable service with specifications that will remain constant even when the prop has been in heavy use.
In addition, Ballistic props can withstand the harsh marine conditions without suffering the corrosion levels that less durable props will show. Innovative features of these props include the fact that engine RPMs can be lowered without performance being affected, which means that the engine delivers power more effectively.
Aluminum Outboard Propellers
The Michigan Wheel company also makes a Vortex line of propellers that feature blades made of aluminum. These propellers can offer cost savings over stainless steel props, but this must be weighed against the many advantages inherent to steel.
Michigan Wheel Vortex props are high performance propellers fashioned from aluminum, a metal that is strong yet lightweight. Both of these features lead to engine efficiencies and can contribute to lower fuel consumption. All Vortex propellers utilize the revolutionary interchangeable hub system known as the XHS Xchangeable.
In addition, Vortex propellers possess a high degree of precision in the blade design, incorporating both high performance geometry and a careful balance among the blades for optimum performance. Covered with a powder coating that imparts a high gloss finish, Michigan Wheel Vortex propellers are beautiful as well as functional. They also come in a large range of styles and designs engineered to suit various applications. For example, Vortex propellers can be purchased in both three and four blade varieties. They work with V6 and V8 engines, and they can be used with engines that vary in horsepower from 20 HP all the way up to an impressive 70 HP.
These features make them ideal replacement propellers, but many boaters do not wait until their current prop develops a problem to buy a Vortex replacement. Instead, they carry a Vortex prop on board as a spare so that they are prepared in advance to deal with emergencies. Few motorists would consider an outing in the absence of a spare tire – it only stands to reason that boating enthusiasts would be well advised to have a spare propeller on hand.
One unfortunate side effect of immersing metals in seawater is corrosion. A specific type of decay known as galvanic corrosion can happen when two kinds of metal are connected and then exposed to salt water. In layman’s terms, this causes the metals to behave in a battery-like fashion; current will begin to flow between them as electrons from the atoms of one of the metals are converted into metal ions and lost into the seawater. Galvanic corrosion usually proceeds at a rapid pace and destroys the metals involved.
This is obviously a large problem for boaters. Propellers are frequently mounted on shafts made of stainless steel, but those same propellers are themselves made of other metals such as aluminum or alloys such as bronze.
Avoiding Galvanic Corrosion: The Role of Anodes
In order to avoid forming a battery circuit, designers of boats and motors have long used the technique of the anode. This involves providing a third type of metal such as zinc, which is placed in electrical contact with the other two metals involved. Designed to be “sacrificed,” this third metal has inherent qualities that cause it to readily lose electrons. Since nature takes the path of least resistance, the zinc anodes will decay and eventually be replaced so that shafts and propellers can remain pristine.
Boat zincs can also help to protect other watercraft elements such as rudders and hull plates. These zincs take a variety of forms including round plates, rectangular plates, and cylinders designed to encircle a propeller shaft.
One of the great advantages of Michigan Match propellers is their price point. Michigan Match props are of a high quality and perform better than many propellers that come with motors to begin with, but they typically can be purchased for a lower price than comparable propellers from other major manufacturers. This is done without sacrificing the quality that customers have come to expect, which means that there is no reason for boating enthusiasts not to choose Michigan Match propellers when they need an aftermarket solution that will deliver solid propulsion and acceleration.
High Quality Spindle
One of the best features of propellers from Michigan Match is the spindle. These are fashioned from NAVAL brass and feature a hub cushioned with rubber in order to absorb the stress and impact that comes with any mechanical system. Boaters who have Michigan Match props can shift gears without worrying that this very action is wearing down their spindle to an inordinate degree.
In addition, Michigan Match propellers have a rubber bushing that will spin free when subjected to any significant impact. This feature helps the system to avoid greater levels of damage that would be more expensive and time-consuming to repair.
In appearance, propellers manufactured by Michigan Match are powder black with a high gloss that makes them aesthetically appealing and helps to cut down on the drag that can result in a loss of speed. The coating also serves to protect the aluminum core of the propeller.
Among marine shaft seals, no other type sells better across the world than PSS shaft seals. These marine mechanical seals are even included by default by many of the world’s finest boatyards, whose expert craftsmen consider them to be standard equipment. PSS stands for “Packless Sealing System,” which is an excellent description of the technology that makes these seals so exceptional. These marine shaft seals function without as much constant attention as other kinds of sealing systems. In particular, PSS marine shaft seals do not need to be adjusted often and they free boating enthusiasts from the need for frequent maintenance.
In addition, a PSS Shaft Seal is completely watertight, which means that water will not accumulate in the bilge. This feature also helps to cut down on wear and tear to the shaft of the propeller so that boating enthusiasts can enjoy a trouble-free watercraft experience for a long while to come.
PSS Shaft Seals are simple to install, even in retrofit situations, and can fit shafts as small as ¾ inch and as large as six full inches or 150 mm across. In essence, the PSS marine shaft seal consists of a face seal between the two flat surfaces provided by a carbon flange, which remains stationary, and a rotor, which rotates. The shaft seal serves to compensate as the propeller produces thrust. This helps to eliminate not just problems caused by vibration, but also those that are a result of small misalignments. A key part of these seals is the use of O-rings that rotate along with the shaft so that they will not wear down over time.
Obtaining an ideal match of propeller and motor involves far more than simply making sure that you have the correct diameter and pitch figures. Propellers are far more complex than two specifications can capture, and they are one of the most vital components to any motorized watercraft. After all, the propeller largely determines whether the engine’s power – and fuel consumption – will be directed into the production of propulsion, or whether power and fuel will simply be wasted.
All Volvo Penta propellers are designed to be perfect complements to certain boating tasks. Volvo Penta Duo Props Type A are specially engineered to produce exemplary grip on the water, which leads to a high level of fuel utilization. Volvo Duo Props Type A work with diesel engines and are constructed of sturdy aluminum, which of course has inherent advantages in that aluminum is a material that does not rust.
What is a Duo Prop?
Those new to the sport of leisure boating may not have heard of a “duo prop,” but the term is self-explanatory. Duo props are propeller arrangements that actually have two propellers. Volvo Penta Duo Props classed as Type A feature a design that is unique in the boat propeller industry: a three-bladed propeller in the front of the unit and a propeller with four blades in the rear. This combination is what gives these propellers such an ability to grip the water and deliver high-level performance.
Tohatsu is a manufacturer of aftermarket propellers designed to be installed on outboard motors. The standard sizes of Tohatsu Boat Propellers vary from a diameter of a few inches to much larger propellers that measure almost a foot across. The different sizes of propellers from Tohatsu also differ in pitch, a term that refers to the distance that a full revolution of the propeller will move the boat forward.
Materials Used in Construction
A majority of Tohatsu props are manufactured of aluminum, but the company also makes some that use stainless steel as their base material. The latter propellers generally fit on motors that are rated at 25 horsepower and above. Aluminum propellers are more lightweight for their surface area and can have additional advantages. Some boating enthusiasts report that some aluminum propellers produce a quieter ride than do stainless steel models.
Pitch and Load Considerations
Pitch has more implications than simply the distance a boat will move forward as the propeller spins. Propeller pitch is also a major factor in determining what the top speed of a boat will be as well as how fast that boat can accelerate to reach its top speed.
Another important thing to consider is the load rating of a propeller. A light load is considered to be from 100 to 500 pounds. Propellers that can handle boats and contents weighing between 500 and 1,500 pounds are classed in the medium load rating. A heavy load varies from 1,500 pounds to 3,000 pounds.
Johnson boat propellers are available in both aluminum and stainless steel varieties. One of the first decisions any boating enthusiast must make when considering propellers is this very issue – choice of metal.
Advantages and Disadvantages of Aluminum
Aluminum is generally considered to be an “all purpose” metal appropriate for a wide variety of recreational uses. This is because it is less expensive than stainless steel. Johnson propellers that use aluminum are, therefore, more affordable for the average boater.
Although aluminum is indeed less strong per cubic inch than stainless steel, it is fully strong enough for most common boating uses. Pleasure crafts generally come equipped from the factory with aluminum propellers already installed. As long as a boater is careful to check that the propeller is from a reputable company and meets quality standards, it will be able to live up to the demands commonly placed on it during family fishing trips and other casual outings.
Advantages and Disadvantages of Stainless Steel
Stainless steel, on the other hand, is a much stronger metal than aluminum. This not only makes it more durable and long-lasting, but it also means that stainless steel can both survive more abuse and remain reliable under more trying circumstances.
High-end boating is the kind of situation where stainless steel Johnson Props are preferable. This is because a stainless steel propeller will allow boating enthusiasts to accelerate much faster and will also permit higher top speeds.
The major disadvantage of stainless steel, however, is that it is a more expensive option than aluminum.