Description
Key features
Lighter weight & compact: at 377 pounds, the new f115b is 24 pounds lighter than the previous generation (f115la). Weight savings come from a variety of new materials, such as a composite lower pan and cowling, a single ram power trim and tilt mechanism and a new lightweight mounting bracket.
More powerful: the f115’s powerhead is all-new with increased bore and stroke, now measuring a full 1.8 litres. At the same time, this double- overhead cam (dohc) four-cylinder design gets larger intake and exhaust valves for easier breathing, more power and better midrange torque. Complementing the new valves and cylinder head is a new 60-mm single throttle body with yamaha’s long intake track system, and a new free-flow exhaust manifold. Compression ratio is increased, and so is the full-throttle rpm range: 5,300 to 6,300. A knock sensor, an unexpected feature in this class of outboard, allows the engine to operate constantly at peak output. The result is terrific acceleration and a zero-to-200-foot time that’s 0.7 sec. Faster than that of the f115a.
Versatile: the f115 is just right for so many kinds of boats: pontoons, bay boats, fish’n’skis, sport boats, deep v aluminum boats, rib inflatables and more. Its lightweight, high-strength mounting bracket uses the same mounting holes as most other models of outboards. Available in three models, it can be equipped for either remote control or use with a tiller handle. Like its big brother, the f150, the f115 comes in both left and right-hand rotation for use in twin applications.
Engine
Engine type: In-line four-cylinder
Displacement: 1832cc
Bore & stroke: 81 x 88.9mm (3.19 x 3.5in)
Rpm range: 5,300-6,300
Compression ratio: 10:1
Induction system: Efi (dohc)
Alternator output: 35 amps
Fuel delivery: Multi-point electronic fuel injection
Starting: Electric w/ptt
Ignition: Tci microcomputer
Lubrication: Wet sump
Degree of trim/tilt: -4° through +16°
Exhaust: Through propeller
Cooling: Thermostatic control
Gear shift: F/n/r
Gear ratio: 28:13 (2.15:1)
Fuel & lubrication
Recommended fuel: Unleaded gasoline (minimum pump octane 87)
Recommended oil: Yamalube 4-m
Oil capacity: 3.2l/3.0l w/without filter
Dimensions
Shaft length: 20″ – 25″
Dry weight: 171 kg (377lbs)
