25

Powerful Performer

About

25

About

Features

Advantage

Reliability

Line Up

Compatibility

Specs

Gallery

25

Powerful Performer

432cc, Inline 2-cylinder, single overhead camshaft

Features & Benefits

Key Features

Yamaha’s first battery-less electronic fuel injection
Variable Trolling Control for slower-than-idle speed trolling
Available in pull start/manual tilt or electric start/power trim and tilt
Tiller and forward control options available
Simple to use and quiet fresh water flushing port for long-term engine care
Select models compatible with Yamaha’s digital gauges

Features & benefits

Power & Performance

Convenience & Control

Improved Response
Prime Start
- Exclusive to Yamaha, PrimeStart™ makes starting as easy as starting a car.
- Automatically controls the ‘warming up’ process.
- Eliminates the need for a choke or revving in neutral for cold starts.
Smart
Battery-Less EFI
- Yamaha's first battery-less fuel injection system makes engine set-up more simple and convenient.
- Achieves optimum engine performance including easier starts, better fuel economy and improved acceleration.
- Available in pull-start model only.
Lightweight
Practical
- Starting at 57kg, this engine can be lifted on and off your craft, placed in the back of your vehicle or stored on a shelf or engine stand.
Effortless Starting
Pull Start Decompression Device
- The decompression device releases pressure in the cylinder when the manual pull start is engaged, allowing for effortless pull starting.
- An electronic ignition and a built-in internal primer pump further aide starting.
Compact Power
Twin Cylinder SOHC Engine
- Small in size, but big in performance, the 432cc, 25HP, 2-cylinder, single overhead camshaft (SOHC), four-stroke engine is lightweight and portable.
- Suitable for tinnies, inflatables and poly boats.
Seamless Performance
Smooth Operation
- With impressive features like a long span mounting and labyrinth exhaust system, this engine delivers smooth and quiet power.
Charging Power
Alternator
- The 12 Volt 16 Amp high-output alternator ensures that power is always available to start the engine, even after long periods of idling.
- Provides sufficient power to run an array of electronic devices.
- Available with the electric start model only.
Improved Response
Prime Start
- Exclusive to Yamaha, PrimeStart™ makes starting as easy as starting a car.
- Automatically controls the ‘warming up’ process.
- Eliminates the need for a choke or revving in neutral for cold starts.
Smart
Battery-Less EFI
- Yamaha's first battery-less fuel injection system makes engine set-up more simple and convenient.
- Achieves optimum engine performance including easier starts, better fuel economy and improved acceleration.
- Available in pull-start model only.
Lightweight
Practical
- Starting at 57kg, this engine can be lifted on and off your craft, placed in the back of your vehicle or stored on a shelf or engine stand.
Effortless Starting
Pull Start Decompression Device
- The decompression device releases pressure in the cylinder when the manual pull start is engaged, allowing for effortless pull starting.
- An electronic ignition and a built-in internal primer pump further aide starting.
Compact Power
Twin Cylinder SOHC Engine
- Small in size, but big in performance, the 432cc, 25HP, 2-cylinder, single overhead camshaft (SOHC), four-stroke engine is lightweight and portable.
- Suitable for tinnies, inflatables and poly boats.
Seamless Performance
Smooth Operation
- With impressive features like a long span mounting and labyrinth exhaust system, this engine delivers smooth and quiet power.
Charging Power
Alternator
- The 12 Volt 16 Amp high-output alternator ensures that power is always available to start the engine, even after long periods of idling.
- Provides sufficient power to run an array of electronic devices.
- Available with the electric start model only.
Improved Response
Prime Start
- Exclusive to Yamaha, PrimeStart™ makes starting as easy as starting a car.
- Automatically controls the ‘warming up’ process.
- Eliminates the need for a choke or revving in neutral for cold starts.
Smart
Battery-Less EFI
- Yamaha's first battery-less fuel injection system makes engine set-up more simple and convenient.
- Achieves optimum engine performance including easier starts, better fuel economy and improved acceleration.
- Available in pull-start model only.
Lightweight
Practical
- Starting at 57kg, this engine can be lifted on and off your craft, placed in the back of your vehicle or stored on a shelf or engine stand.
Effortless Starting
Pull Start Decompression Device
- The decompression device releases pressure in the cylinder when the manual pull start is engaged, allowing for effortless pull starting.
- An electronic ignition and a built-in internal primer pump further aide starting.
Compact Power
Twin Cylinder SOHC Engine
- Small in size, but big in performance, the 432cc, 25HP, 2-cylinder, single overhead camshaft (SOHC), four-stroke engine is lightweight and portable.
- Suitable for tinnies, inflatables and poly boats.
Seamless Performance
Smooth Operation
- With impressive features like a long span mounting and labyrinth exhaust system, this engine delivers smooth and quiet power.
Charging Power
Alternator
- The 12 Volt 16 Amp high-output alternator ensures that power is always available to start the engine, even after long periods of idling.
- Provides sufficient power to run an array of electronic devices.
- Available with the electric start model only.
Improved Response
Prime Start
- Exclusive to Yamaha, PrimeStart™ makes starting as easy as starting a car.
- Automatically controls the ‘warming up’ process.
- Eliminates the need for a choke or revving in neutral for cold starts.
Smart
Battery-Less EFI
- Yamaha's first battery-less fuel injection system makes engine set-up more simple and convenient.
- Achieves optimum engine performance including easier starts, better fuel economy and improved acceleration.
- Available in pull-start model only.
Lightweight
Practical
- Starting at 57kg, this engine can be lifted on and off your craft, placed in the back of your vehicle or stored on a shelf or engine stand.
Effortless Starting
Pull Start Decompression Device
- The decompression device releases pressure in the cylinder when the manual pull start is engaged, allowing for effortless pull starting.
- An electronic ignition and a built-in internal primer pump further aide starting.
Compact Power
Twin Cylinder SOHC Engine
- Small in size, but big in performance, the 432cc, 25HP, 2-cylinder, single overhead camshaft (SOHC), four-stroke engine is lightweight and portable.
- Suitable for tinnies, inflatables and poly boats.
Seamless Performance
Smooth Operation
- With impressive features like a long span mounting and labyrinth exhaust system, this engine delivers smooth and quiet power.
Charging Power
Alternator
- The 12 Volt 16 Amp high-output alternator ensures that power is always available to start the engine, even after long periods of idling.
- Provides sufficient power to run an array of electronic devices.
- Available with the electric start model only.

Easy Stowing
Engine Rest Pad
- The rest-pads allow the engine to be laid and stored vertically on its back.
- Alternatively, it can be laid on its side if more space is available.
- The advanced leak-proof oil system ensures hassle-free transport and storage without oil leaks.
Better Control
Large Shift Lever and Tiller Handle
- A large and comfortable twist-grip throttle allows easy control of the engine.
- The side-mounted shift selector and integrated kill provide added user convenience.
- Combined these features deliver superb handling and manoeuvrability.
Portability
Ergonomic Carry and Control Handles
- Large grips located on the front and back of the engine and foldaway tiller handle make carrying, mounting, removing and storing the engine easy.
Reassurance
Manual & Electric Start
- The electric start model comes with both a manual pull-starter and electric starter for added convenience.
- The pull-starter option is handy for situations when the battery has failed.
Greater Control
Single Action Steering Friction
- You can easily adjust how firm or loose the tiller steering movement feels.
- This provides the user with excellent stability and control even at higher speeds.
Precise Control
Variable Trolling Control
- Yamaha’s variable trolling control lets the skipper adjust engine idle speed in 50 RPM increments via the digital gauge.
- This allows you to set a precise trolling speed for better lure presentation when targeting different fish species.
Easy Flushing
Fresh Water Flushing Device
- Simply connect a garden hose to the outboard's input port to flush out salt and debris without starting the engine.
- This helps prevent corrosion, extends the life of the outboard and keeps things nice and quiet for your neighbours.
More Convenience
Power Trim and Tilt
- Power Trim and Tilt (PTT) allows for the quick and easy tilting up and down of the engine and fine trim adjustment, for a more enjoyable boating experience.
Easy Stowing
Engine Rest Pad
- The rest-pads allow the engine to be laid and stored vertically on its back.
- Alternatively, it can be laid on its side if more space is available.
- The advanced leak-proof oil system ensures hassle-free transport and storage without oil leaks.
Better Control
Large Shift Lever and Tiller Handle
- A large and comfortable twist-grip throttle allows easy control of the engine.
- The side-mounted shift selector and integrated kill provide added user convenience.
- Combined these features deliver superb handling and manoeuvrability.
Portability
Ergonomic Carry and Control Handles
- Large grips located on the front and back of the engine and foldaway tiller handle make carrying, mounting, removing and storing the engine easy.
Reassurance
Manual & Electric Start
- The electric start model comes with both a manual pull-starter and electric starter for added convenience.
- The pull-starter option is handy for situations when the battery has failed.
Greater Control
Single Action Steering Friction
- You can easily adjust how firm or loose the tiller steering movement feels.
- This provides the user with excellent stability and control even at higher speeds.
Precise Control
Variable Trolling Control
- Yamaha’s variable trolling control lets the skipper adjust engine idle speed in 50 RPM increments via the digital gauge.
- This allows you to set a precise trolling speed for better lure presentation when targeting different fish species.
Easy Flushing
Fresh Water Flushing Device
- Simply connect a garden hose to the outboard's input port to flush out salt and debris without starting the engine.
- This helps prevent corrosion, extends the life of the outboard and keeps things nice and quiet for your neighbours.
More Convenience
Power Trim and Tilt
- Power Trim and Tilt (PTT) allows for the quick and easy tilting up and down of the engine and fine trim adjustment, for a more enjoyable boating experience.
Easy Stowing
Engine Rest Pad
- The rest-pads allow the engine to be laid and stored vertically on its back.
- Alternatively, it can be laid on its side if more space is available.
- The advanced leak-proof oil system ensures hassle-free transport and storage without oil leaks.
Better Control
Large Shift Lever and Tiller Handle
- A large and comfortable twist-grip throttle allows easy control of the engine.
- The side-mounted shift selector and integrated kill provide added user convenience.
- Combined these features deliver superb handling and manoeuvrability.
Portability
Ergonomic Carry and Control Handles
- Large grips located on the front and back of the engine and foldaway tiller handle make carrying, mounting, removing and storing the engine easy.
Reassurance
Manual & Electric Start
- The electric start model comes with both a manual pull-starter and electric starter for added convenience.
- The pull-starter option is handy for situations when the battery has failed.
Greater Control
Single Action Steering Friction
- You can easily adjust how firm or loose the tiller steering movement feels.
- This provides the user with excellent stability and control even at higher speeds.
Precise Control
Variable Trolling Control
- Yamaha’s variable trolling control lets the skipper adjust engine idle speed in 50 RPM increments via the digital gauge.
- This allows you to set a precise trolling speed for better lure presentation when targeting different fish species.
Easy Flushing
Fresh Water Flushing Device
- Simply connect a garden hose to the outboard's input port to flush out salt and debris without starting the engine.
- This helps prevent corrosion, extends the life of the outboard and keeps things nice and quiet for your neighbours.
More Convenience
Power Trim and Tilt
- Power Trim and Tilt (PTT) allows for the quick and easy tilting up and down of the engine and fine trim adjustment, for a more enjoyable boating experience.
Easy Stowing
Engine Rest Pad
- The rest-pads allow the engine to be laid and stored vertically on its back.
- Alternatively, it can be laid on its side if more space is available.
- The advanced leak-proof oil system ensures hassle-free transport and storage without oil leaks.
Better Control
Large Shift Lever and Tiller Handle
- A large and comfortable twist-grip throttle allows easy control of the engine.
- The side-mounted shift selector and integrated kill provide added user convenience.
- Combined these features deliver superb handling and manoeuvrability.
Portability
Ergonomic Carry and Control Handles
- Large grips located on the front and back of the engine and foldaway tiller handle make carrying, mounting, removing and storing the engine easy.
Reassurance
Manual & Electric Start
- The electric start model comes with both a manual pull-starter and electric starter for added convenience.
- The pull-starter option is handy for situations when the battery has failed.
Greater Control
Single Action Steering Friction
- You can easily adjust how firm or loose the tiller steering movement feels.
- This provides the user with excellent stability and control even at higher speeds.
Precise Control
Variable Trolling Control
- Yamaha’s variable trolling control lets the skipper adjust engine idle speed in 50 RPM increments via the digital gauge.
- This allows you to set a precise trolling speed for better lure presentation when targeting different fish species.
Easy Flushing
Fresh Water Flushing Device
- Simply connect a garden hose to the outboard's input port to flush out salt and debris without starting the engine.
- This helps prevent corrosion, extends the life of the outboard and keeps things nice and quiet for your neighbours.
More Convenience
Power Trim and Tilt
- Power Trim and Tilt (PTT) allows for the quick and easy tilting up and down of the engine and fine trim adjustment, for a more enjoyable boating experience.

Yamaha Advantage

Built tough.

Legendary Reliability

Marine Grade Stainless Steel

The highest quality marine grade stainless steel componentry is used extensively throughout all Yamaha outboards for superior durability in the most extreme and corrosive operating enviroments.

Legendary Reliability

Smooth & Whisper Quiet
Shift dampening props, labyrinth exhaust systems, water-sealed outer shaft walls and noise-suppressing cowlings are just some of the technologies that help Yamaha outboards achieve such smooth and whisper quiet operation.
Fuel Efficiency
Yamaha’s Multi-Point Electronic Fuel Injection (EFI), vapor management and low-emission technologies are just some of the reasons why Yamaha outboards deliver excellent fuel economy and reduced emissions.
Four-stroke Advantage
Utilising advanced Electronic Fuel Injection (EFI) and engine management technologies, Yamaha four-stroke outboards are extremely powerful, smart, efficient and environmentally friendly.
2+2 Year Warranty
Yamaha outboards are covered under a two-year Manufacturer’s warranty, plus an extra two-years Extended Warranty for Customers who complete their scheduled services with an Authorised Yamaha Outboard Dealer. VMAX V6 models receive a two-year, plus one-year extended warranty.
Yamaha Built Componentry
We build our own gauges, throttles, props and other rigging componentry, to deliver a completely integrated and seamless engine ecosystem for superior outboard performance.
Japanese Quality
Uncompromising attention to detail, precision engineering and a continuous improvement philosophy make Japanese-made Yamaha outboards renowned for their exceptional quality, durability and performance.
Legendary Reliability
There’s a reason more Australian boaters choose Yamaha outboards. Yamaha has earned a reputation for building the world’s most reliable outboards, allowing you to relax and enjoy your time on the water.
Smooth & Whisper Quiet
Shift dampening props, labyrinth exhaust systems, water-sealed outer shaft walls and noise-suppressing cowlings are just some of the technologies that help Yamaha outboards achieve such smooth and whisper quiet operation.
Fuel Efficiency
Yamaha’s Multi-Point Electronic Fuel Injection (EFI), vapor management and low-emission technologies are just some of the reasons why Yamaha outboards deliver excellent fuel economy and reduced emissions.
Four-stroke Advantage
Utilising advanced Electronic Fuel Injection (EFI) and engine management technologies, Yamaha four-stroke outboards are extremely powerful, smart, efficient and environmentally friendly.
2+2 Year Warranty
Yamaha outboards are covered under a two-year Manufacturer’s warranty, plus an extra two-years Extended Warranty for Customers who complete their scheduled services with an Authorised Yamaha Outboard Dealer. VMAX V6 models receive a two-year, plus one-year extended warranty.
Yamaha Built Componentry
We build our own gauges, throttles, props and other rigging componentry, to deliver a completely integrated and seamless engine ecosystem for superior outboard performance.
Japanese Quality
Uncompromising attention to detail, precision engineering and a continuous improvement philosophy make Japanese-made Yamaha outboards renowned for their exceptional quality, durability and performance.
Legendary Reliability
There’s a reason more Australian boaters choose Yamaha outboards. Yamaha has earned a reputation for building the world’s most reliable outboards, allowing you to relax and enjoy your time on the water.
Smooth & Whisper Quiet
Shift dampening props, labyrinth exhaust systems, water-sealed outer shaft walls and noise-suppressing cowlings are just some of the technologies that help Yamaha outboards achieve such smooth and whisper quiet operation.
Fuel Efficiency
Yamaha’s Multi-Point Electronic Fuel Injection (EFI), vapor management and low-emission technologies are just some of the reasons why Yamaha outboards deliver excellent fuel economy and reduced emissions.
Four-stroke Advantage
Utilising advanced Electronic Fuel Injection (EFI) and engine management technologies, Yamaha four-stroke outboards are extremely powerful, smart, efficient and environmentally friendly.
2+2 Year Warranty
Yamaha outboards are covered under a two-year Manufacturer’s warranty, plus an extra two-years Extended Warranty for Customers who complete their scheduled services with an Authorised Yamaha Outboard Dealer. VMAX V6 models receive a two-year, plus one-year extended warranty.
Yamaha Built Componentry
We build our own gauges, throttles, props and other rigging componentry, to deliver a completely integrated and seamless engine ecosystem for superior outboard performance.
Japanese Quality
Uncompromising attention to detail, precision engineering and a continuous improvement philosophy make Japanese-made Yamaha outboards renowned for their exceptional quality, durability and performance.
Legendary Reliability
There’s a reason more Australian boaters choose Yamaha outboards. Yamaha has earned a reputation for building the world’s most reliable outboards, allowing you to relax and enjoy your time on the water.
Smooth & Whisper Quiet
Shift dampening props, labyrinth exhaust systems, water-sealed outer shaft walls and noise-suppressing cowlings are just some of the technologies that help Yamaha outboards achieve such smooth and whisper quiet operation.
Fuel Efficiency
Yamaha’s Multi-Point Electronic Fuel Injection (EFI), vapor management and low-emission technologies are just some of the reasons why Yamaha outboards deliver excellent fuel economy and reduced emissions.
Four-stroke Advantage
Utilising advanced Electronic Fuel Injection (EFI) and engine management technologies, Yamaha four-stroke outboards are extremely powerful, smart, efficient and environmentally friendly.
2+2 Year Warranty
Yamaha outboards are covered under a two-year Manufacturer’s warranty, plus an extra two-years Extended Warranty for Customers who complete their scheduled services with an Authorised Yamaha Outboard Dealer. VMAX V6 models receive a two-year, plus one-year extended warranty.
Yamaha Built Componentry
We build our own gauges, throttles, props and other rigging componentry, to deliver a completely integrated and seamless engine ecosystem for superior outboard performance.
Japanese Quality
Uncompromising attention to detail, precision engineering and a continuous improvement philosophy make Japanese-made Yamaha outboards renowned for their exceptional quality, durability and performance.
Legendary Reliability
There’s a reason more Australian boaters choose Yamaha outboards. Yamaha has earned a reputation for building the world’s most reliable outboards, allowing you to relax and enjoy your time on the water.