In order to stay compliant with EPA emissions guidelines, the top outboard motor manufacturers had to refine their two-stroke and four-stroke engines. The Honda BF115 is an example of a job well done. The four-stroke outboard was adapted from the 2.3-liter four-cylinder Accord sedan motor.
The BF115 runs quietly and is highly economical when it comes to fuel consumption, which can be attributed to its long-stroke design. A fat midrange torque curve makes towing water skis or inflatable tubes easy. The only drawback is that the motor weighs in at 496 lbs. which can be problematic for lighter crafts. It still gets a stamp of approval from me, provided you use the correct lubricant, Evinrude outboard oil.