2002 Engine Preview Page 8

2002 Engine Preview - Yamaha
Engines — Richard Thiel, Capt. Ken Kreisler, Capt. Patrick Sciacca

- Yamaha
2002 Engine Preview

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The F225 is Yamaha’s big-shouldered entry into the big-horsepower, four-stroke arena. This 225-hp V-6 features a compact 60-degree cylinder block conceived from the beginning as a marine engine. A 24-valve, double overhead cam uses four valves per cylinder for superior breathing, which means maximum power and fuel efficiency. The front-mounted freshwater flushing device makes flushing easy whether at the dock or in the driveway. The power trim and tilt switch is removable and reversible so you can mount it on either port or starboard, a handy feature for twin-engine applications. An idle speed controller provides for stable idling as well as quick starts and smooth operation while trolling, and because intake air passes through a silencer before entering the cylinder, sound levels are reduced. To bolster fuel efficiency, Yamaha engineers have equipped the F225 with "ram-charge manifold fuel injection." Six specially tuned intake tracks–each with its own throttle valve and fuel injector–create pulsating waves that force the air-fuel mixture into the cylinder. (800) 88-YAMAHA. www.yamaha-motor.com.

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This article originally appeared in the January 2003 issue of Power & Motoryacht magazine.

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