Volvo Penta diesels make impressive impact on tugboat performance09/12/2003
“We installed our first engines three years ago, and today this is an important market for us,” says Kent Lundgren, head of the Diesel Engines division at Volvo Penta of the Americas. “Satisfied customers are the best testimonial to our engine performance, and we are now noticing a demand that did not exist before.”
Increased maintenance costs
Stevens Towing Company has a fleet of six tugboats and about 25 barges that operate on waterways in the eastern US. The engines onboard have previously been 12-cylinder, two-stroke diesels, but increasing maintenance needs and relatively heavy fuel consumption convinced Stevens Towing to try out new state-of-the-art four-stroke diesel engines on one of the tugboats.
The vessel chosen for the refit was the 56-foot tugboat Island Express. The existing installation comprised twin two-stroke engines, each developing 400 horsepower. Following the refit, the vessel has twin 510-horsepower Volvo Penta TAMD165C diesel engines.
“So far, the engines have run for 1,500 hours of trouble free operation with no service requirements beyond normal maintenance,” says Arthur Bailey of Superior Diesel, who supplied the engines and takes care of servicing them.
“We have installed flow meters on Island Express and a sister vessel still running on the old engines. Our preliminary figures show that we are making fuel savings of 15-20 percent, in addition to considerably higher availability and minimal maintenance costs. I calculate that we can earn back the cost of an engine in just one year’s operation, which means that both engines will have paid for themselves after only two years,” says Bos Smith, Operations Manager at Stevens Towing.
Another beneficial effect has been improved working conditions for the crew – being a straight six-cylinder diesel, the TAMD165C generates far lower noise levels and minimal vibration.
“The level of comfort onboard has improved enormously and the crew members are very pleased,” concludes Bos Smith.
Tugboat Island Express
Length: 17.1 meters (56 feet)
Beam: 6.7 meters (22 feet)
Propulsion engines: 2 x Volvo Penta TAMD165C diesels, each generating 510 horsepower
Owner: Stevens Towing, Yonges Island, South Carolina, USA
For further information please contact Ann-Charlotte Emegård, AB Volvo Penta,
phone: +46 31 668418, E-mail: ann-charlotte [dot] emegard [at] volvo [dot] com