Yamaha Four Stroke 115HP Outboard Engine

Yamaha Four Stroke 115HP Outboard Engine
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.

Short
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.

Yamaha F115 Half
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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.

Multi-Point Electronic Fuel Injection

The previous-generation F75 used a 79mm cylinder bore, in the next-generation F90 the cylinder bore size has been increased from 79mm to 81mm which provides more efficient power delivery. A larger valve has been used for increased transfer efficiency for both intake and exhaust.

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

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.

Engine Type

4-Stroke, 16 Valve DOHC Direct Action In-line 4

Bore x Stroke (mm)

81 X 88.9

Fuel Tank Capacity (l)

User Selectible

Displacement (cc)

1832.0

Fuel Management

EFI

Ignition

TCI

OEDA Emission Rating

3

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 Multifunction Tiller)

Trim & Tilt Method

Power Trim & Tilt

Digital Gauges

Optional

Transom Height (mm [inch])

L: 516 [20.3] | X: 643 [25.3]

Weight

L: 171 | X: 176

Conventional - 6Y5 Round Gauges

Yamaha’s conventional digital multi-function gauges provide the real-time data required to maximise outboard performance and fuel efficiency. The two and three gauge illuminated display options provide rpm, trim, oil, speed, distance, time, overheating, battery, fuel economy/flow/consumption stats.

Command Link - 6Y8 Round Gauges

Using Local Area Network (LAN) technology, these digital round gauges provide accurate and real-time tachometer, speed and fuel management stats, including fuel flow/consumption/economy (up to two tanks), trim level, battery voltage, push button trolling speed adjustments and more.

Command Link - 6YC High Definition Gauge

This high definition, colour display uses Local Area Network (LAN) technology to deliver accurate and real-time stats for single and twin engine setups. The customisable day/night gauge delivers information on fuel flow/ economy/ consumption, trim level, battery charge, speed, push button trolling and more.

703 Side-Mounted Control

One of Yamaha's best selling controls, this mechanical remote offers comfort, simplicity and flexibility. With its new ergonomic grip, reversible right-hand or left-hand installation, and convenient trim and tilt operation, this control offers all-round functionality and value.

6x3 Concealed Side-Mounted Control

With its stylish chrome finish and ergonomic design, this mechanical control not only looks good, but provides effortless one-hand operation. The trim and tilt switch is comfortably located on the handle and features easily accessible neutral warm-up controls and externally adjustable throttle friction.

704 Premium Single Binnacle Control

This highly-polished, stylish looking, top mounted control allows for effortless one-handed control. The ergonomic design features a thumb operated trim and tilt switch built into the handle, as well as shift and throttle control functions, for convenient and comfortable operation.

704 Premium Twin Binnacle Control

This highly-polished, stylish looking, top mounted control allows for effortless operation of twin mounted outboards. The ergonomic design features a thumb operated trim and tilt switches built into the handles, as well as shift and throttle control functions, for convenient and comfortable operation.

Genuine Yamaha Propellers

Prop choice makes a huge difference to outboard acceleration, top-end speed, handling and fuel efficiency. That is why Yamaha continues to push the technological boundaries in the design and development of our leading range of high performance props - ensuring every Yamaha outboard performs at its peak.

Alloy White K Series

These props deliver Yamaha's high-quality design and performance in a low-cost, lightweight propeller. They offer a good all-round choice for Yamaha outboards, coming in a wide range of sizes and pitches to suit every power requirement.

Alloy GP K Series

The newly released aluminium GP introduces a renewed blade geometry and Yamaha’s Shift Dampener System (SDS) for ‘clunk free’ shifting to the K series of props. Suited to lighter hulls, this exceptional prop delivers improved acceleration, speed, fuel economy and anti-ventilation.

Aluminium SDS K Series

These high-quality aluminium props are ideal for heavier hulled boats such as fiberglass and plate aluminium, as well as modified V-type hulls, catamarans, pontoon and commercial work launches. Incorporating Yamaha's Shift Dampener System (SDS), these props deliver quiet and smooth shifting.

Performance Series 3/4 Blade

These specialised stainless steel props can enhance boat performance and improve how they handle particular conditions. The four-blade prop is ideal for rougher conditions and when greater acceleration is required, such as towing. These props are now available with Yamaha’s Shift Dampener System.

Yamaha Shift Dampener System

Many of Yamaha's mid-range and high horsepower props come with Yamaha’s exclusive Shift Dampener System (SDS). This system absorbs forces created when an engine shifts in and out of gear, resulting in a quieter, smoother and ‘clunk free’ shifting.

YCOP Remote Control Security System

Yamaha’s Customer Outboard Protection (Y-COP) engine immobiliser system is easy to use and highly effective in stopping unauthorised start-ups when your boat is unattended.

Multifunction Tiller Handle

With the latest technologies, ergonomic design and features, Yamaha's optional Multi-Function Tiller Handle delivers effortless control, maneuverability and comfort. Trim, shift, throttle, stop switch, variable trolling and integrated overheating and low oil pressure warning alerts are all built into the handle.

Yamaha F115

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