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More 4-strokes from Yamaha

Yamaha continues to expand its stable of second-generation 4-strokes with the introduction this spring of two midrange engines. A new F115 replaces the original introduced in 1999, and an F175 has been added.

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“Customers have been coming back in droves to that 115-hp segment in 4-stroke engines, and with the advances in technology since 1999 [we figured] we’d come out with a 115 that uses the new technology,” says product information manager David Meeler. “It gave us an opportunity to get the weight down, get the power up and maximize the fuel efficiency.”

Yamaha reduced the F115’s weight by 24 pounds while improving acceleration and power through increased displacement. The outboard displaces 1.8 liters, compared with the original’s 1.7, and has an increased bore and stroke.

The engine was designed in conjunction with Yamaha’s newest propeller, the Talon, which brings Shift Dampener System technology to larger midrange outboards. “And there’s no special hardware required to use it,” Meeler says. A new alternator delivers more power: 35 amps at wide-open throttle, compared with 24 for the previous F115 and 28 at 1,000 rpm.

The F175 joins the F200 and VF150 4-strokes Yamaha introduced last year. “There are boats out there that are limited to 175 hp — that is the reason this engine was introduced to the line,” Meeler says.

Yamaha builds the F175 with the same 2.8-liter, inline 4-cylinder engine as the F200 and VF150. But unlike those engines, the F175 does not use Yamaha’s Variable Camshaft Timing. “To meet its performance targets, it did not require VCT, so to reduce complexity and cost it was not used,” Meeler says.

The F175 is $16,050 for the short shaft (20 inches) and $16,430 for the long shaft (25 inches). The F115 is $11,455 for the short shaft and $11,525 for the long.

April 2014 issue