Maintenance Tip of the Week – Zincs 03/30/2015


Maintenance Tip of the Week – Zincs

Zinc anodes are one of the most important maintenance items for your boat. Always make certain that zincs are replaced when necessary, even if they are not yet scheduled in the manual. Differences in seawater salinity and temperature can greatly increase the amount of zincs required, as can the installation of new equipment on the vessel.


Price Match Guarantee – Australia Promotion


Marinediesel is proud to announce our latest promotion for our customers in Australia: The Price Match Guarantee.

Quite simply, Marinediesel will match any price on a competing engine, or we will pay you $150! That’s right. You get the legendary Marinediesel power and performance, but at the lowest price possible. This offer is for bonafide written offers on comparable engine models. Therefore, we are taking price out of the equation. We are trying this promotion in Australia first, with possible rollout to other regions in the world.

In order to take advantage of this offer, simply contact our Australian distributor, MD Australia for full details and a quote!:

284 South Tce
South Fremantle, WA 6162
Phone: +61 8 9335 9777
Fax: +61 8 9335 3233
Terms of the offer:
Marinediesel will match any bonafide offer on a competing product, or we will pay the customer A$150, free and clear.  This offer is valid on the following engine models competing with the VGT Series:
  1. Volvo Penta D6
  2. Yanmar 8LV Series, 6LP Series, or 6LY Series
  3. Cummins QSB 6.7, 5.9
  4. Caterpillar C6-4 (High speed craft Only)
  5. Mercury 4.2 TDI (Bobtail only, without drive)
***Note: Marinediesel will consider other models / offers from other manufacturers IF the products are similar in function, application, rating, and warranty.***
Customer must present the dealer a confirmed offer from an authorized dealer, in writing, of a competing product. This offer MUST be forwarded to MD FROM THE DEALER. We will not accept offers directly from customers.
Competing offer must be dated within 30 days.
Marinediesel’s price match quote will be valid for 30 days.
If Marinediesel is unwilling or unable to match the offer, dealer will provide the customer’s name, address, and banking details to MD. MD will remit, via wire transfer, A$150 directly to the customer within 30 days.

50 knots


50 knots.

92.6 kph.

57.54 mph.

25.72 m/second.

The top speed of a hare.

1/3 of the speed of an Apache helicopter.

1/3 of the speed of a skydiver falling headfirst.

0.29 of the speed of the TGV trains.

Typically, this is also the speed that separates high speed and high performance craft from merely fast craft. This is the “speed limit” that effectively ends the use of water jets as a propulsion option. Need to go faster? Then you will need to use outboards, stern drives, or surface drives. This speed is exceedingly fast over water. Why? The answer is resistance. A boat needs to overcome the force of the water. Vehicles on land also experience resistance, but it is more limited, related to wind (though boats have this, too) or the friction on tires, rather than needing to push through an opposing force constantly. Remember, at high speeds, water would feel like cement should you decide to dip your hand over the side of the boat.

This is why 500 hp on land is usually far faster than 500 hp on water.

MarineDiesel has equipped boats that have exceeded not only 50 knots in speed, but over 70 knots. We specialize in powering high speed, high performance vessels.

Contact us or your local MarineDiesel distributor today for a quote on your project.







How to destroy your marine engine in one easy step


The picture above is of a cracked piston that was part of the engine on a military vessel. The reason that the piston cracked was the failure of the engine cooling system. Why did the system fail?

It was a simple reason: A plastic bag.

The vessel was operating in an area that had quite a bit of rubbish in the area. A plastic bag blocked the raw water intake and strainer, the impeller failed, and the engine overheated, resulting in the severe damage pictured above. The problem with plastic bags, on top of the obvious environmental issues, is that not only are they difficult to see, especially when traveling at high speeds, but that they float, thus making them easy to get stuck in strainers or block intakes.

What is interesting is how quickly engine damage can result from this situation. The intake on this vessel was blocked for perhaps 15 seconds. Engines produce an awful lot of heat, and it is necessary to remove that heat. When the cooling system stops functioning, even briefly, damage is certain to result. The damage above was extremely costly to repair, requiring, effectively, a complete rebuilding of the engine since the cylinder walls were damaged. This does not take into account the costs of the vessel downtime, which can be substantial on a commercial or military vessel.

So, what should you do?

  1. If you will be operating in areas with a lot of rubbish, pay particular attention to the cooling system.
  2. Monitor your pressures and temperatures. Do not ignore any alarms.
  3. Shut the engine down immediately if you sense the intake or the strainer is blocked.
  4. If there is no blockage, then a faulty water pump is the likely cause.




ECA drive: A solution for low-draft situations


In last week’s articles, we detailed the various types of drives that are options with MarineDiesel’s engines as a complete package. There is, however, another type of drive that we will package, especially on vessels that will frequently be used near reefs, shallow rivers, or anywhere that has shallow draft: The ECA Articulated Shaft Drive.

The ECA drive is, on quick inspection, a conventional propeller, shaft, and rudder. Indeed, the drive can operate perfectly efficiently as such. On closer inspection, however, you will not a hydraulic lift and CV joint. These allow the shaft to trim up and down for use in shallow areas. Indeed, the drives were first developed for small fishermen who needed to navigate across or around shallow reefs. The drives allowed such navigation in areas that would damage other types of propulsion.

Manufactured in Spain by ECA, the drives are beginning to be noticed by naval architects. Indeed, we have recently shipped a number of engine / propulsion packages with the drives. Please see the video below for a better understanding of the ECA drives and how they work:

For more information on ECA drives, or for a custom quote for your project, contact your local MarineDiesel distributor or MarineDiesel direct.





MarineDiesel Distributor Profile – Amos Industries Singapore


Today’s article is a profile of MarineDiesel’s long time distributor in Singapore, Amos Industries Pte Ltd.

Established since 1996, Amos Industries is now a fully accredited ISO 9001:2008 company, with the UKAS Quality management stamp of approval. Not only so, we are certified with the BizSafe level 3 accreditation from workplace health & safety council in 2011.

Being in the business for over a decade, many strong customer relationships have been built through our professional services and products. This has also led us to work in partnership with many shipyards and boat owners.

We provide the complete one-stop, hassle-free solution for your boating needs, supplying a wide range of boating products and equipment. The range of products spans across lightweight high horsepower diesel engines, marine generators, power systems, air conditioning systems and boat sublift system.

Integrity is vital to us; evident by our promise to stand by manufacturers’ warranties and guarantees. We believe after – sales service is important to both our customers and us, as such, we stock a wide range of spare parts, and provides timely after – sales support. Our people are committed to go the extra mile for the customer, understanding and delivering a value driven solution for their needs, building Amos’s success upon reliability, honesty and integrity.

In addition to MarineDiesel engines, Amos is the distributor for Singapore for the following brands:

Seatek Engines

Hyundai Seasall

Mercury Outboards

Kohler Gensets

Konrad Stern Drives

Amos is fully factory trained in MarineDiesel products, and has inventory of spare parts in Singapore.

If you or your company are located in Singapore, and you would like a customized quote on MarineDiesel engines for your project, contact Amos Industries today:

1 Yishun street 23
05-09 YS-ONE
768441 Singapore
Phone: +65 6853 8055
Fax: +65 6852 1635




Maintenance Tip of the Week – Grease 03/23/2015


Maintenance Tip of the Week – Grease

Avoid using graphite grease, which can increase the rate of corrosion. Instead, use lithium grease which can limit galvanic corrosion.


Remote Component Installation


MarineDiesel specializes in powering small, fast boats, and a substantial percentage of our installations are on small RHIBs or other vessels with very small, tiny, or compact engine compartments. One thing that should be a major consideration when choosing which engine to power your vessel should be the accessibility of that engine for routine maintenance. For instance, if the engine starter is located at the bottom of the engine, and there is a problem, how easily can that starter be reached? Can it be accessed from the deck or on top? Or, must the entire engine be removed just to access the starter, a process that takes both time and labour?

Due to our experience with small craft, we are well aware of the challenges that engineers and vessel owners face, regarding maintenance and accessibility. Some engines were simply not designed to be used in places with tight access.

At MarineDiesel, we addressed this problem by making the most commonly accessed engine components easily either accessible from the top, or able to be mounted remotely from the engine. For instance, the previously mentioned starter is normally located on the lower part of the engine. However, with some cabling and a mount, that starter can be moved to a more accessible location. Additionally, most of our filters and even the intercooler can be remote mounted, apart from the engine.

This makes all MarineDiesel engines far more versatile than any competing engine on the market. In fact, try asking our competitors if they will even sell you such an engine. In most cases, the answer will likely be a define “No”.

All we need in order to modify the engine is to know what the requirements are in advance. Contact your local MarineDiesel distributor today for a quote on your project.





Why should you use a fuel vacuum gauge or sensor?


On this blog, we have often discussed the importance of fuel quality and fuel filtration when it comes to engine reliability and long engine life cycles. Quite frankly, nothing is more important to your engines than using good quality fuel. However, in some regions of the world, this task becomes difficult, if not nearly impossible to ensure.

Because of this problem, one thing a boat owner may do to minimize the chance of engine damage, in addition to faithfully changing fuel filters, is the installation of a fuel vacuum gauge or sensor to monitor the pressure in the fuel lines. When installed between the remote filter and the fuel pump, the gauge can alert the vessel operator of a blockage in the filter of fuel line, giving advance notice of the need to change filters before serious damage can occur. At best, a clogged filter leads to an engine that is starved for fuel. At worst, severe engine damage from contaminants in the fuel (something like damage to the common rail or injectors can be far more expensive than a simple filter change).

Additionally, fuel should be filtered in stages, incrementally, with the largest filters closest to the tank, and the finest filters nearest the engine.

Finally, fuel filters are cheap. Purchase only OEM or equivalent filters for your engine. Savings from cheap, aftermarket filters are rarely worth the long term costs and expense.





Sacrificial Anodes: Cheap protection for your engines


Galvanic corrosion is often a problem in the marine industry. This is basic chemistry, but the results can become extremely expensive if ignored. When dissimilar metals are placed together in an electrolyte (like seawater), there is an electric current produced. Effectively, this process is the same way that a battery works. Your engine and propulsion system become batteries, and are subject to corrosion. The term “noble” metals is used to define a specific resistance to corrosion. Therefore, a hierarchy, like the chart pictured above, can be made. When two metals are placed in an electrolyte, the less noble metal “sacrifices” itself to protect the more noble metal. An example would be a bronze propeller connected to a stainless steel shaft. The propeller, made of bronze, will corrode faster than the shaft.

The solution to this corrosion is the use of sacrificial anodes made of less noble metals that will corrode faster than the expensive vessel components. Anodes can be made of many metals and alloys, but the most common in the marine industry is zinc, followed by aluminium and magnesium.

Since engines are connected to components that are in contact with seawater, they, too, must be protected. Zinc “pencil” anodes are typically part of our recommended spare parts list. They are cheap, and easy to replace (as in, no excuses).

How many anodes will a vessel require? Though the answer may sound flippant, it is, “It depends”.

Seawater conditions. More salinity generally requires greater quantities of anodes.

Water temperature. Warmer water typically requires greater quantities of anodes.

Hull material. An aluminium hull will require greater quantities of anodes than a GRP hull.

Amount of exposure. Corrosion impacts the entire system, but stern drives and surface drives will usually require more anodes.

Freshwater use requires different anode alloys than salt water. However, pollution will also impact the anode choice.

Sacrificial anodes are cheap. However, care must be taken to ensure that the anodes are really made of the proper material. Ultra cheap anodes are often made of substandard materials, and their use can get very expensive in the long term.

The downside to anodes? They are heavy. There is a balance between protecting a vessel and over protecting a vessel. Over protection can lead to hull damage or paint / coating damage, in addition to the extra weight involved.

Another solution is the use of electronic cathodic protection systems. These systems create an opposite charge from the charge produced by the vessel. These systems, though often expensive, are useful on vessels that are in varying environments, and can instantly be changed before corrosion occurs.