/ / Repowering Your Vessel

Repowering Your Vessel

Repower Options
Rebuilding your current engine
Pros Cons
  • Minimal amount of work and cost
  • You know your engine
  • No need to worry about emissions
  • Durability not as good as original engine
  • No improvement in fuel consumption
  • Warranty only on new components
Replacing your current engine with a remanufactured engine
Pros Cons
  • You know your engine
  • No need to worry about vessel systems
  • Durability similar to original engine
  • Some manufacturers provide longer-term warranties
  • No need to worry about emissions
  • No improvement in fuel consumption
  • No potential for vessel speed increase
Replacing your current engine with a new engine
Pros Cons
  • Improved reliability and durability
  • Long-term warranties
  • Improved fuel consumption
  • Reduced smoke and noise
  • Potential for reducing operating costs
  • Potential for increased vessel speed
  • Vessel systems need to be reviewed
Items to consider before repowering your vessel
Marine Diesel Engines
Know your current vessel performance Fuel and oil consumption
  • Establish your performance baseline
  • Define your duty cycle and load factor
Use the load factor and duty cycle to figure out the potential fuel consumption savings. You might be able to repay for the repower in a few years.
Determine if additional power will increase the vessel speed Emissions
  • How much power is required to obtain the speed you want?
  • Does the vessel have room for a larger propeller or shaft?
The answers to these questions aren't simple, so talk to an experienced professional!
Emissions standards are in place in the United States. New rules will apply in 2012 that might require additional exhaust aftertreatment for your vessel.

International rule applies if you travel to one of the countries that have ratified MARPOL 73/78 Annex VI. Review requirements with qualified personnel.
Review vessel systems
  • Make physical comparisons to see if the new engine will fit
  • Review the mounting structure and make sure it will support the engine and power
  • Is the ventilation system sufficient for the air flows?
  • Is the cooling system sufficient for flows and heat rejection?
  • Is the exhaust system large enough for the exhaust flow?
  • Will the exhaust system handle the exhaust temperatures?
  • Will the fuel system provide enough fuel to the engine?
  • Do you need to change the fuel filters to meet requirements of the engine?
  • Are the batteries large enough to start the engine?
  • Is the charging system large enough to keep the batteries charged?

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