Cleaner and More Powerful Diesels
Technology is helping the latest marine diesel engines provide more horsepower with less pollution in 2012.
What’s the downside to diesel engines? That’s an easy one—they smoke like crazy on startup and they’re loud. Well new engines from some of the best-known names in diesels could turn everyone’s perception on a dime. In the past year, Cummins, Volvo Penta, Caterpillar, John Deere, and Yanmar have all introduced engines that meet the Environmental Protection Agency’s Tier III emissions rating. While that’s great news, boaters will like the other benefits they bring: more power and quieter operation. Most can be used in inboard, pod, or stern drive applications. To learn more out about these engines and others that may suit your needs, click here.
 New Develpments in Hybrid Marine Propulsion
Systems that combine diesel power with electric motors make for quiet, efficient operation. But will they ever make sense in terms of efficiency? We plumb the depths of the hybrid question to sort out the details and determine the benefits of the various system types. To see what we found, click here.
Online Exclusive: Video diagrams show how hybrids work. Click here.
Improvements in Cooling Systems
The evolution of cooling systems has allowed engine manufacturers to add horsepower and reduce weight at an astonishing pace. But those systems only work with proper maintenance. Check out the June 2012 issue for the full story, including a maintenance schedule for a variety of cooling systems.
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