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YANMAR’s Clean Diesel Marine Engines at Work on Eco-Sensitive Gulf Coast Waters - 7/6/2015 -

Diesel Technology Forum

Sherry LAccording to a "2011 Economic Impacts of State of Texas Ports and Maritime Industry" report, 564.7 million tons of cargo move through Texas ports generating 25 percent of the total state gross domestic product and sustaining 112,100 directly related jobs. This accounts for roughly 25 percent of all cargo moved in the 360 commercial sea and river ports located in the U.S. Moving this much trade requires many diesel-engine fueled trucks, trains, ships, barges, workboats and more. Harbor craft, or marine vessels that help larger vessels and ships, are just one piece of this puzzle generally accounting for five to 25 percent of port emissions making it important to upgrade the diesel engines powering these workboats to offer the cleanest emissions possible.

With more than 60 years of worldwide experience in commercial marine diesel engines, YANMAR has now positioned itself as a leader for the future of diesel engines in the workboat market with its latest EPA compliant commercially rated engine, the 6AYAM-ET. With an operating performance of 755 mhp at 1,900 rpm and 20.38 liters of displacement, this 6 in-line cylinder mechanical engine is expected to be a workhorse on the United States waterways for years to come. Key features of this engine include a one to one-and-a-half gallon reduction in fuel consumption per hour over similar engines, 500-hour service interval, torque characteristics for stable cruising purpose built marine design including mechanically controlled injection pumps and conventional injectors designed for easy inspection and an internal exhaust gas recirculation system that doesn't require any external control devices.

The first U.S. application in push boat Sherry L, owned by E Squared Marine Services, LLC from Texas and repowered by Laborde Products, features two 6AYAM-ET engines. Even though the engines are still in their first trial year, they have already been exceeding expectations. Since the ship operates 24 hours a day pushing inland barges from Channelview to Galveston and on intercostal waterways, it can't afford to take a day off; thanks to its new 755 mhp engines equipped with SmartAssist, it won't have to. YANMAR's unique SmartAssist technology allows the engines to be monitored remotely to ensure ideal operating conditions. And, when it's time for maintenance, the system will send out a reminder, so that maintenance can be completed on the boat's schedule to make sure it stays in operation the maximum amount of time possible.

The 61' Sherry L is a twin screw steel Push Boat of 152 DWT built by A&B Industries of Morgan City. The installation of the 6AYAM-ET engines was an easy repower reset with a propulsion package that kept the existing set of Twin Disc marine gears MG5170DC ratio 5.03, as well as existing shafts and propellers. The monitoring system consists of a conventional harness with instrument panel and an optional M200C system that converts conventional engine data into CAN bus protocol. The engines installed work with a dual circuit (HT-LT) cooling water system, and are equipped with factory installed air starters.

Tommy Echols, co-owner of E Squared, commented, "These engines perform better than expected, while also offering quieter operation than the engines they replaced and over any other engine I have ever installed in a tug. The fuel consumption is also exceeding expectations especially for the engine's horsepower range."

E Squared, a company offering all types of marine transportation in the Gulf Coast, chose Laborde Products, YANMAR's local distributor, and this particular YANMAR engine not only because it met the stringent EPA Tier III requirements and fit their size and horsepower requirements, but also due to previous good experience working with Laborde.

When asked if he would recommend these new engines to others, Echols replied, "Definitely; when these engines are available for mass distribution, I will highly recommend them to any company that needs the power these engines produce. They are a great addition to the commercial diesel market since there is no other manufacturer that has this 750-800 mhp rating."

With this latest engine technology from YANMAR and more engines planned for the future, workboat owners in the North American Emissions Control Area (ECA) can operate knowing that their engines are a clean solution for the eco-sensitive gulf and U.S. waterways.

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