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With a full-throttle RPM range of 5500-6300, the Honda BF100 is a high-performance, 4-cylinder, 1.5 liter (91.4 CID) four-stroke outboard weighing in at a lean 366 pounds. Although the BF100 uses the same block as her little sisters the BF75 and BF90, she is designed to rev higher and produces her full potential using 93-octane premium gasoline.
By Capt. John N. Raguso

The design and technology applied to the new Honda mid-range marine engine is the very same that powers Honda automobiles such as the Accord, CR-V, Civic, Fit, Odyssey, and Pilot. This cross-platform integration of technology illustrates the Honda commitment to high performance, fuel efficiency and environmental excellence for its customers.

The Honda BF100 incorporates numerous innovative, advanced design elements, making this all-new engine a leading mid-range outboard choice for coastal anglers. One of these is Variable Valve Timing and Lift Electronic Control (VTEC), which utilizes mild cam lobes to operate intake valves at low rpm, then engages a high-output lobe for higher-rpm operation. The design provides a unique blend of power, torque and efficiency at any speed.

Another high-tech feature on the BF100 is the Boosted Low Speed Torque (BLAST) system dramatically improves hole shot and acceleration by advancing ignition spark timing to within one degree of the knock limit during “hammer down” acceleration. The resulting boost in available torque at low rpm contributes to a strong hole shot to get the boat up on plane quickly. The ignition spark timing is appropriately adjusted under slower throttle advancement, ensuring a leaner air/fuel mix and class-leading fuel efficiency.

The Lean Burn Control is yet another standard that automatically adjusts the air/fuel mix according to speed and load while maximizing power throughout the acceleration range—providing best-in-class fuel economy in cruise mode (2,000 to 4,500 rpm). Programmed electronic fuel injection delivers the precise amount of fuel/air to each engine cylinder. The result is easy starting, along with instant throttle response and superior fuel efficiency.

Superior battery charging is achieved with the Honda exclusive neodymium magnet flywheel, producing 44 total amps and 35 battery charging amps, since some of this charging power is dedicated to running electronic components on the engine. A new, high performance gear case reduces drag, minimizes hull porpoising and reduces spray, which applies more of the generated propshaft power to increase acceleration and top end speed. In addition, the Honda BF100 engine is NMEA 2000 certified, which insures that the product has been tested to meet specific critical safety criteria and to correctly implement network management and messaging. NMEA developed this open architecture electronic protocol to allow engine data to be interfaced with a wide variety of name brand marine electronics. In meeting this certification, the BF100 does not require the added expense of proprietary gateway devices.

Factory tests using the BF100 on an Alumacraft Voyageur 175 had this hull hitting a top speed of 41 mph at 6300 rpm spinning a 17-inch pitch Solas 3-blade stainless steel prop. Backing the throttle down to an easy-cruising 3500 revs, she hit 20.6-mph on the GPS sipping only 2.3 gallons of petrol per hour, for an impressive 9.0 mpg. Bumping the control up to 4-grand, she turned 25.2 mph at 3.2 gph, for a bottom line of 7.9 mpg. That type of performance will take you a long way between fill-ups. If you need to race across the bay to catch the tide, 4500 rpm pushed this 17-footer along at 29.9 mph at 4.4 gph, for a net of 6.8 mpg.

All new Honda outboard engines sold for recreational use, including the new BF100, offer an industry-best True 5-year, non-declining limited factory warranty that is the same on the last day as it is on the first.

Engine Type - 4-stroke, in-line, 4-cylinder, SOHC
Displacement - 91.4 cubic inches (1.5-liter)
Bore and Stroke - 3.0 x 3.5 inches (73mm x 89.4mm)
HP Rating - 100 propshaft HP @ 5900 rpm
Full Throttle Range - 5500-6300 rpm
Fuel Delivery System - programmed electronic fuel injection
Fuel Type - unleaded gasoline (93-octane)
Alternator Capacity - 44-amps (35 battery charging amps)
Gear Ratio - 2.33:1
Shaft Length - 20 (L) and 25-inches (XL)
Dry Weight - 366-lbs (without prop)