Page 44: of Marine News Magazine (May 2013)

sively advance the ignition timing. According to Honda, this allows the engine to produce more torque to im- prove acceleration (hole shot) at low speeds. For law enforcement, military and patrol operations, the combina- tion of VTEC and BLAST, therefore, represents an enormous advantage. HAND IN HAND: FUEL ECONOMY AND THE ENVIRONMENT All Honda outboards boast en- vironmental performance that in- cludes meeting the rigorous Califor- nia CARB Three-Star Standard. The Three-Star label identiÞ es engines as Ultra Low Emission if they meet CARBÕs 2008 exhaust emission stan- dards. Engines meeting this standard produce 65 percent fewer emissions than One Star (Low Emission) en- gines. Along with that Ð and just as important Ð the new Honda Marine BF250 outboard engine produces en- viable best fuel economy. According to Steve Drenkard, Lean Burn Control is the key. Automatically adjusting the air/fuel mix according to speed and load while maximizing pow- er throughout the acceleration range Ð providing as much as 20 percent greater fuel economy in cruise mode (2,000 to 4,500 rpm) Ð Lean Burn Control has been enhanced to improve fuel efÞ -ciency even further in speciÞ c cruising ranges, resulting in best-in-class fuel economy Ð as much as 30 percent bet- ter than competitive models, depend- ing on speciÞ c running conditions. The air/fuel ratio control is performed by the Electronic Control Unit (ECU), based on the feedback from the O2 sensor, allowing more accurate control in the lean-burn range. Finally, the gear case of the BF250 engine incorporates an advanced design that minimizes wa- ter resistance, and by extension, reduces the overall drag coefÞ cient by Þ ve per- cent (even without the use of the larger, optional propeller). Honda BF250 four-stroke engine Cutaway view of Honda?s BF250 engine Positioning - for success. 8 cm accuracy worldwide (2 drms) High accuracy Heading/Pitch and Roll sensors GPS, GLONASS and GNSS solutions QA/QC NMEA outputs compliant with OGP 373-19 / IMCA S 015 Precise Stable & Reliable Easy to Install Angola Brazil Mexico Singapore South Africa United Kingdom USA www.cnav.com WORLD DGNSS44 MNMay 2013MN May2013 Layout 32-49.indd 44MN May2013 Layout 32-49.indd 445/3/2013 12:57:43 PM5/3/2013 12:57:43 PM