High HP Four Stroke F115
Yamaha has been leading the way in the 115 horsepower four-stroke category for over ten years, with exceptional models that have proven the true value and versatility that a four-stroke outboard can deliver Australian boaters. With its increased engine capacity and a weight reduction of 15kg, the latest generation Yamaha F115 offers the best power-to-weight performance in its class – while maintaining an extremely fuel efficient and smooth operation that Yamaha four-strokes are famous for. This engine utilises a 16 valve, dual overhead camshaft design, electronic fuel injection and big bore throttle body to deliver awesome acceleration and mid-range responsiveness.
The 115 horsepower is now available in both signature Yamaha grey and new pearlescent white colour options, in both long and extra long shaft length.
1832cc Four-Cylinder Engine
The 16 valve, 1.8 litre, dual overhead camshaft design delivers superior efficiency in the transfer of intake and exhaust gasses throughout the RPM range. The F115 incorporates larger intake and exhaust valves which enhance response, efficiency and mid-range torque.
81MM Cylinder Bore
The cylinder bore size has been increased from 79mm to 81mm which provides more engine torque. A larger valve was adopted for increased transfer efficiency for both intake and exhaust.
Counter Rotating Propeller
This engine offers a counter rotating propeller option for improved steering control for twin engine setups, ensuring the vessel maintains a 'neutral helm' at any speed.
F115 Performance Data Reports
We take out the guess work in buying a new outboard, by rigorously testing our engines on Australia's most popular boat brands. See how the F115 performs for acceleration, fuel economy and top-end speed on your favourite boat.
Yamaha Outboard Tech
Yamaha offers a range of rigging options to suit every boat. Check out the full suite of controls, gauges, switches, props and other technologies, plus outboard performance data.
Multi-Point Electronic Fuel Injection
The Multi-Point Electronic Fuel Injection (EFI) system, injects the right amount of fuel into the combustion chamber at the optimum timing, for ‘first-time, every-time’ hot and cold starting, improved fuel efficiency, excellent throttle response.
Offset Crankshaft
The crankshaft design is offset by 5mm from the centre of the cylinder. This innovative design decreases internal friction and promotes a more efficient transfer of power to the crankshaft.
Shift Dampener System
Yamaha’s Shift Dampener System (SDS), built into selected Yamaha propellers, delivers smooth and quiet operation when shifting in and out of gear by absorbing the force that is created.
Single Ram Power Trim and Tilt
The compact and light-weight single ram power, trim and tilt (PTT) unit and bracket have been developed exclusively for this engine.
Variable Trolling Control
Yamaha’s variable trolling control allows the skipper to precisely adjust the engine’s idling speed from 600 to 1000 RPM in 50 RPM increments. The ability to finely tune the trolling speed allows fisherman to perfect their lure presentation when chasing different species of fish.
TECHNICAL SPECIFICATIONS
Engine
| Engine Type | 4-Stroke, 16 Valve DOHC Direct Action In-line 4 |
| Bore x Stroke (mm) | 81 X 88.9 |
| Fuel Tank Capacity (l) | |
| Displacement (cc) | 1832.0 |
| Recommended Maximum RPM | 5300-6300 |
| Fuel Management | EFI |
| Ignition | TCI |
| Lubrication System | Wet sump |
| Alternator Output | 12V - 35A with rectifier regulator |
| Gear Ratio | 2.15 : 1 (Counter Rotating Prop Available) |
| Starter System | Electric |
| Operation Method | Mechanical Control (Optional Tiller Handle Available) |
| Trim and Tilt Method | Power Trim & Tilt |
| Digital Gauges | Optional |
| Command Link Gauges | Optional |
Dimensions
| Transom Height (mm [inch]) | L: 516 [20.3] | X 643 [25.3] |
| Dry Weight (kg) | L: 171 | X: 176 |
