1
NEWS
SYDNEY BOAT SHOW: New Cummins 550hp QSB6.7
Sydney debut of clean-running compact new Cummins diesel engine to replace QSB5.9Cummins will have a display version of its eagerly awaited new QSB6.7 diesel engine, available for the South Pacific recreational marine market in October 2013, at the Sydney International Boat Show opening August 1.
With a top rating off 550hp, the new 6.7-litre QSB boasts the best power density in its class, claims the engine maker.
While meeting US EPA Tier 3 emissions standards, immediately for the American market, the QSB6.7 offers better performance along with lower noise and vibration than Cummins’ ever-popular QSB5.9. But without sacrificing fuel economy.
Cummins reached US Tier 3 emissions levels by improving the efficiency of the in-cylinder combustion events. A new fuel-calibration strategy allows for less wasted fuel, creating less particulate matter and resulting in cleaner exhaust.
“While reducing emissions levels often means a sacrifice in performance and fuel efficiency, Cummins has avoided that sacrifice,” says Tony Lee, Cummins South Pacific marine business manager.
The QSB6.7 not only generates more power than the QSB5.9 (480hp maximum) but also higher torque, which means better acceleration and maintained speed through turns.
The 6.7-litre Cummins also employs a new fuel-calibration strategy. Unlike most marine engines, the QSB6.7 is calibrated for optimal fuel economy at cruise speeds, where the engine is most often used, rather than at wide-open throttle.
“The QSB6.7 is sociably improved, offering exceptionally low cold-start smoke levels and significant sound reduction at cruise and rated speeds compared with the QSB5.9,” says Mr Lee.
The QSB6.7 shares many of the base engine design features of the QSB5.9. “The new engine is an evolution of the 5.9-litre QSB which has a proven record of reliability and durability in not only marine but also automotive, industrial and power generation applications,” Mr Lee points out.
The QSB6.7 will be available from 230hp to 550hp for the pleasure-boat market. There will be “metal on display”, a breakdown of the new engine, and graphics at the 2013 Sydney International Boat Show opening August 1 at Darling Harbour.
Cummins will also be getting the message out that it builds engines above 15 litres and up to 2000hp for marine applications. But the new QSB6.7 is destined for great popularity and production-boat use locally after being extensively tested in the US in a broad range of applications.
Read the latest Boatsales Network news and reviews on your mobile, iPhone or PDA at the Boatsales Network's mobile site. Or download the all-new App.
Tags
Share this article
Written byBoatsales Staff
See all articlesStay up to dateBecome a boatsales member and get the latest news, reviews and advice straight to your inbox.
Subscribe todayDisclaimer
Please see our Editorial Guidelines & Code of Ethics (including for more information about sponsored content and paid events). The information published on this website is of a general nature only and doesn’t consider your particular circumstances or needs.
Please see our Editorial Guidelines & Code of Ethics (including for more information about sponsored content and paid events). The information published on this website is of a general nature only and doesn’t consider your particular circumstances or needs.
Contact
Advertise with us
International marketplaces
Consent
Download the boatsales app
