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Yamaha LF300 4.2L V6 Offshore Outboard Motor (Counter Rotation) - Shop All Models

SKU: C-PVYAM-LF300ECB
$27,450.00

Description

Yamaha Outboard – LF300ECB

35-Inch Shaft | Counter Rotation | DEC (Digital Electronic Control) | Electric Start | Power Trim & Tilt | EFI with VCT | Gray

The Yamaha LF300ECB is built for offshore boats that need extra propeller depth, strong mid-range power, and confident handling in rough water. With its 35-inch shaft, this model is aimed at tall-transom offshore hulls where keeping the prop in clean water makes all the difference. The counter-rotation setup helps balance steering torque when running twins or triples, giving the operator smoother handling at all speeds.

This engine uses Yamaha’s 4.2-liter V6 with Variable Camshaft Timing and EFI, a combination known for quick throttle response, clean acceleration, and good fuel economy for a motor in this class. The Gray finish gives it a clean, factory look and is built to stand up to long-term saltwater use.

⚠️ Important: This is a Digital Electronic Control (DEC) engine. Installation and setup must be performed by an authorized Yamaha dealer. The engine and control system require flashing and programming with Yamaha diagnostic tools. DIY installation is not supported.

Key Features:

  • Engine Type: 4.2L V6, DOHC with Variable Camshaft Timing
  • Horsepower: 300 HP
  • Fuel System: Electronic Fuel Injection (EFI)
  • Controls: Digital Electronic Control (DEC)
  • Start Type: Electric Start
  • Shaft Length: 35"
  • Rotation: Counter Rotation
  • Trim & Tilt: Power Trim & Tilt
  • Color: Gray
  • Alternator: High-output for powering multiple marine electronics
  • Weight: Approx. 562 lbs (dry)

Why Choose the Yamaha LF300ECB?

  • Extra-Long 35" Shaft – Keeps the propeller planted in deep or choppy water
  • Counter-Rotation – Reduces steering torque in multi-engine rigs
  • DEC Precision – Smooth, responsive throttle and shifting
  • Durable Gray Finish – Built for offshore corrosion resistance
  • Long-Term Reliability – Yamaha’s 4.2L platform is known for durability

Need help choosing your engine? Check out our Yamaha engine guide.

Frequently Asked Questions

Q: Why would I choose a 35-inch shaft?
A: It’s meant for boats with higher transoms or offshore conditions where the prop needs to stay fully submerged.

Q: Does this work with standard rigging?
A: It requires Yamaha DEC rigging components, which are sold separately.

Q: Can I install this engine myself?
A: No. It must be installed and programmed by a certified Yamaha dealer using Yamaha diagnostic equipment.

Specifications
  • Specifications
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Reviews

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Yamaha LF300 4.2L V6 Offshore Outboard Motor (Counter Rotation) - Shop All Models
Yamaha

Yamaha LF300 4.2L V6 Offshore Outboard Motor (Counter Rotation) - Shop All Models

From $25,925.00

#Model-LF300XA

Yamaha Outboard – LF300XA

25-Inch Shaft | Counter Rotation | Mechanical Control | Electric Start | Power Trim & Tilt | EFI with Variable Camshaft Timing | Gray

The Yamaha LF300XA is built for offshore boats that need strong counter-rotating power and dependable control. It runs on Yamaha’s proven 4.2-liter V6 with Variable Camshaft Timing (VCT) and Electronic Fuel Injection (EFI), giving it quick hole shot, solid midrange pull, and efficient fuel use mile after mile.

This model uses a 25-inch shaft and counter-rotation to help a twin-engine setup track straighter and handle better, especially when docking or running through sloppy water. The mechanical control system also gives captains the classic, direct throttle-and-shift feel many still prefer.

Key Features

Why Choose the Yamaha LF300XA?

Frequently Asked Questions

Q: What is the benefit of a counter-rotating outboard?

A: It evens out prop torque in twin-engine setups, which improves handling, tracking, and slow-speed maneuvering.

Q: Is this model digital or mechanical?

A: The LF300XA uses mechanical throttle and shift.

Q: What color does the LF300XA come in?

A: Gray.

#Model-LF300XSB

Yamaha Outboard – LF300XSB

25-Inch Shaft | Counter Rotation | Digital Electronic Control (DEC) | Electric Start | Power Trim & Tilt | EFI with Variable Camshaft Timing | Gray

The Yamaha LF300XSB is the counter-rotating version of Yamaha’s 300 HP V6, meant for folks running twin engines who want the boat to feel calmer and easier to steer. It’s based on the 4.2-liter V6 platform Yamaha has used offshore for years, so the power delivery is strong and steady, and it jumps onto plane without much drama. The VCT and EFI help the motor pull smoothly through the midrange, which is usually where offshore boats spend most of their time anyway.

The 25-inch shaft keeps the prop deep enough on most offshore transoms, and the counter-rotation really shows its value when you’re easing into a dock or trying to hold position in wind or current. The DEC controls take the mechanical “slop” out of the throttle and shifting — it feels clean and immediate, which makes long days at the helm a bit easier.

⚠️ Important: This is a DEC motor and can’t be installed at home. A Yamaha dealer has to flash and program it with Yamaha’s diagnostic tools.

Key Features

Why Choose the Yamaha Outboard – LF300XSB?

Frequently Asked Questions

Q: Why go with a counter-rotating engine?

It evens out torque between engines, so the boat tracks straighter and handles better around docks.

Q: Who should install this?

A Yamaha dealer — DEC engines need proper electronic setup.

Q: What color is it?

Gray.

#Model-LF300XSB2

Yamaha Outboard – LF300XSB2

25-Inch Shaft | Counter Rotation | Digital Electronic Control (DEC) | Electric Start | Power Trim & Tilt | EFI with Variable Camshaft Timing | Pearl White

The Yamaha LF300XSB2 is the counter-rotation version of Yamaha’s 4.2-liter V6, built for offshore boats that need clean tracking and dependable control in twin-engine setups. When paired with a standard-rotation engine, the counter-rotating gearcase helps balance propeller torque and takes some of the load off the helm—something you can really feel when running in open water.

This model uses Yamaha’s 4.2L V6 with Variable Camshaft Timing and EFI, giving it quick throttle response, steady mid-range power, and fuel efficiency that holds up well on long offshore runs. The 25-inch shaft height is well-suited for many offshore hulls, helping the prop stay hooked up even when conditions get sloppy. Finished in Pearl White, it adds a clean, modern look with extra protection against UV and corrosion.

⚠️ Important: This is a Digital Electronic Control (DEC) outboard and must be installed and programmed by an authorized Yamaha dealer. Both the engine and the DEC control system must be flashed and configured using Yamaha diagnostic tools. DIY installation isn’t supported.

Key Features

Why Choose the LF300XSB2?

Frequently Asked Questions

Q: Why choose a counter-rotation outboard?

A: It helps balance prop torque, reducing steering effort and improving tracking—especially important on twin-engine boats.

Q: Who can install a DEC-equipped engine?

A: Only an authorized Yamaha dealer. These engines must be flashed and programmed using Yamaha diagnostic equipment.

Q: What color is the LF300XSB2?

A: Pearl White.

#Model-LF300XSB4

Yamaha Outboard – LF300XSB4

25-Inch Shaft | Counter Rotation | Digital Electronic Control (DEC) | Electric Start | Power Trim & Tilt | EFI with Variable Camshaft Timing | Classic White

The Yamaha LF300XSB4 is the 25-inch counter-rotation version of Yamaha’s 4.2-liter V6, built for boats that rely on tight handling and balanced performance in multi-engine setups. When paired with a standard-rotation motor, the counter-rotating gearcase helps settle steering torque and keeps the boat tracking straighter, especially in rougher offshore conditions.

This engine uses Yamaha’s proven 4.2L V6 with Variable Camshaft Timing and EFI, giving it quick acceleration, strong midrange pull, and dependable fuel economy. The Classic White finish offers a clean, timeless look and holds up well in sun and saltwater.

⚠️ Important: This is a DEC-equipped engine and must be installed and programmed by an authorized Yamaha dealer using Yamaha diagnostic tools. DIY installation is not supported.

Key Features

Why Choose the Yamaha LF300XSB4?

Frequently Asked Questions

Q: Why choose a counter-rotating outboard?

A: It balances prop torque in twin-engine setups, improving steering feel, tracking, and docking control.

Q: Who can install this engine?

A: Only an authorized Yamaha dealer. DEC engines require diagnostic programming during setup.

Q: What color is the LF300XSB4?

A: Classic White.

#Model-LF300USB

Yamaha Outboard – LF300USB

30-Inch Shaft | Counter Rotation | Digital Electronic Control (DEC) | Electric Start | Power Trim & Tilt | EFI with Variable Camshaft Timing | Gray

The Yamaha LF300USB is built for boaters who need steady handling, reliable power, and good balance in offshore conditions. It runs on Yamaha’s well-known 4.2-liter V6 with Variable Camshaft Timing (VCT) and Electronic Fuel Injection (EFI), so it comes off the line quick, holds strong through the midrange, and stays efficient on longer runs.

The 30-inch shaft makes a big difference on boats with higher transoms, keeping the prop down where it belongs and helping reduce ventilation when the water gets sloppy. The counter-rotation design is meant for twin-engine setups and helps the boat track straighter and handle better at slow speeds. With Digital Electronic Control, the throttle and shifting feel clean and smooth, giving you a very controlled helm experience.

⚠️ Important: Because this engine uses DEC controls, it has to be installed by an authorized Yamaha dealer. Both the motor and the control system require flashing and setup with Yamaha diagnostic equipment. It isn’t something that can be done as a DIY job.

Key Features

Why Choose the Yamaha LF300USB?

Frequently Asked Questions

Q: What’s the main reason for choosing a 30-inch shaft?

A: It helps keep the prop at the right depth on boats with tall transoms and reduces ventilation when seas get rough.

Q: Who can install a DEC-equipped engine like this?

A: Only an authorized Yamaha dealer with Yamaha’s diagnostic tools.

Q: Is this designed for twin-engine setups?

A: Yes. The counter-rotating feature is built specifically for multi-engine rigs.

#Model-LF300USB2

Yamaha Outboard – LF300USB2

30-Inch Shaft | Counter Rotation | Digital Electronic Control (DEC) | Electric Start | Power Trim & Tilt | EFI with Variable Camshaft Timing | Pearl White

The Yamaha LF300USB2 is a premium offshore counter-rotating outboard built for smooth handling, balanced performance, and reliable power in multi-engine setups. It’s based on Yamaha’s proven 4.2-liter V6 with Variable Camshaft Timing (VCT) and Electronic Fuel Injection (EFI), giving it quick acceleration, strong midrange pull, and consistent fuel efficiency.

With its 30-inch shaft, the engine sits deeper in the water—ideal for bigger offshore boats with high transoms. This helps reduce ventilation and maintain bite in rough conditions. The counter-rotation design evens out prop torque in a twin-engine layout, making low-speed maneuvering and docking noticeably easier. The Pearl White finish also gives the engine a clean, upscale look that pairs well with luxury offshore builds.

⚠️ Important: This model uses Digital Electronic Control (DEC) and must be installed by an authorized Yamaha dealer. Both the engine and control system need to be flashed and set up with Yamaha diagnostic tools. DIY installation is not supported.

Key Features

Why Choose the Yamaha LF300USB2?

Frequently Asked Questions

Q: Is this model only for twin-engine setups?

A: It’s mainly used in twin configurations for its counter-rotation, but it can be run as a single engine if counter-rotation is preferred.

Q: Who can install this DEC engine?

A: Only an authorized Yamaha dealer with Yamaha diagnostic tools can install and program it.

Q: Why choose Pearl White?

A: Many boaters prefer the Pearl White finish for its sleek, high-end look that matches modern offshore designs.

#Model-LF300USB4

Yamaha LF300USB4 Outboard Motor

30-Inch Shaft | Counter Rotation | Digital Electronic Control (DEC) | Electric Start | Power Trim & Tilt | EFI with Variable Camshaft Timing | Classic White

Yamaha LF300USB4 is all about balance, precision, and power. This counter-rotating offshore outboard is made for larger boats and multi-engine setups that demand control and confidence. Under the hood is Yamaha’s 4.2-liter V6 with Variable Camshaft Timing (VCT) and Electronic Fuel Injection (EFI) — an engine known for its quick throttle response, strong midrange torque, and impressive fuel economy.

The 30-inch shaft gives it the reach needed for deep-transom offshore hulls, keeping the propeller perfectly positioned for efficiency and stability. Its counter-rotation design helps cancel torque when paired with a standard-rotation engine, giving smoother steering and easier handling, especially when docking or maneuvering in tight spaces. Dressed in Classic White, it adds a clean, upscale look to premium offshore boats and yachts.

⚠️ Important Installation Note

This outboard features Yamaha’s Digital Electronic Control (DEC) system and must be installed by an authorized Yamaha dealer. Both the motor and the control system require setup using Yamaha diagnostic tools. DIY installation isn’t supported.

Key Specifications

Why Boaters Choose the LF300USB4

The LF300USB4 is built for boaters who want the perfect mix of strength, balance, and refinement. It’s a serious offshore engine with Yamaha’s hallmark dependability — ideal for twin setups where smooth handling and high torque matter most.

Frequently Asked Questions

Q: What’s the benefit of counter-rotation?

A: It reduces steering effort and balances torque in twin-engine configurations, improving control at both cruising and docking speeds.

Q: Can I install this engine myself?

A: No. DEC engines must be set up by an authorized Yamaha dealer using Yamaha diagnostic tools to ensure proper configuration.

Q: Which boats work best with a 30-inch shaft?

A: Deep-V and offshore fishing boats, as well as multi-engine setups, where a longer shaft keeps the prop at the correct running depth.

#Model-LF300ESB

Yamaha Outboard – LF300ESB

35-Inch Shaft | Counter Rotation | Digital Electronic Control (DEC) | Electric Start | Power Trim & Tilt | EFI with Variable Camshaft Timing | Gray

The Yamaha LF300ESB is built for offshore boats that need strong push, good balance, and the extra depth that a 35-inch shaft provides. On larger deep-V hulls, or in setups running two or three engines, the counter-rotating design helps even out steering effort and keeps the boat from drifting or pulling to one side. That added control really shows up during docking or when the water turns choppy.

The 4.2-liter V6 under the cowling is one of Yamaha’s most trusted offshore platforms. With VCT and EFI, it comes out of the hole quickly and carries plenty of torque through the middle of the powerband without burning unnecessary fuel. The Gray finish is paired with Yamaha’s corrosion-resistant coatings, so the motor holds up well even with heavy saltwater use.

⚠️ Important: Because this engine uses DEC, it has to be installed and programmed by a Yamaha dealer. Both the motor and the control system need to be flashed with Yamaha diagnostic tools, so it isn’t something that can be done at home.

Key Features

Why Choose the Yamaha Outboard – LF300ESB?

Frequently Asked Questions

Q: What boats benefit most from a 35-inch shaft?

A: Boats with tall offshore transoms or rigs that need deeper prop immersion for better stability in rough water.

Q: Can owners install this engine themselves?

A: No. DEC systems must be set up by an authorized Yamaha dealer with Yamaha’s diagnostic equipment.

Q: Why is counter-rotation important?

A: It keeps torque balanced between engines and makes low-speed handling noticeably easier.

#Model-LF300ESB2

Yamaha Outboard – LF300ESB2

35-Inch Shaft | Counter Rotation | Digital Electronic Control (DEC) | Electric Start | Power Trim & Tilt | EFI w/ VCT | Pearl White

The Yamaha LF300ESB2 is the counter-rotating version of Yamaha’s 300-HP offshore V6, finished in Pearl White for boaters who want both performance and a clean, upscale look. It runs on Yamaha’s 4.2-liter V6 platform with Variable Camshaft Timing, giving the motor quick throttle response, strong mid-range torque, and dependable efficiency on long runs offshore. It’s built for multi-engine boats that need balanced handling and solid power in rougher conditions.

Thanks to the 35-inch shaft, the prop sits deeper in the water—something tall offshore transoms and heavy hulls often need to stay hooked up in chop. The counter-rotation feature reduces wheel pull and helps the boat track straighter when paired with a standard-rotation engine. DEC controls finish out the package, providing smooth throttle transitions and predictable shifting.

⚠️ Important: This model must be installed and programmed by an authorized Yamaha dealer. DEC engines require Yamaha diagnostic tools for proper setup.

Key Features

Why Choose the Yamaha Outboard – LF300ESB2?

Frequently Asked Questions

Q: What does the Pearl White finish help with besides appearance?

A: It adds UV and corrosion resistance, which is useful for boats that stay outside or run in harsh saltwater.

Q: Does every boat need a 35-inch shaft?

A: No. It’s mainly for tall transoms or setups where the prop needs extra depth to stay planted.

Q: Why do DEC models require dealer installation?

A: The engine and the controls must be programmed using Yamaha diagnostic tools, so they can only be set up correctly by a Yamaha dealer.

#Model-LF300ESB4

Yamaha Outboard – LF300ESB4

35-Inch Shaft | Counter Rotation | Digital Electronic Control (DEC) | Electric Start | Power Trim & Tilt | EFI with Variable Camshaft Timing | Classic White

The Yamaha LF300ESB4 is built for bigger offshore boats that need steady control and strong, reliable power when the water gets rough. It’s a counter-rotating model, so it’s meant to work alongside a standard-rotation engine in a twin or even triple setup. That pairing helps the boat track straighter and keeps steering from feeling heavy. The 35-inch shaft also puts the prop deep enough for tall offshore transoms, which is important when the hull is lifting and dropping in swells.

This motor runs on Yamaha’s 4.2-liter V6 with VCT and EFI—an engine that’s known for its quick acceleration and solid midrange torque. It doesn’t feel strained, even on heavier boats, and it manages fuel surprisingly well for the amount of power it puts out. The Classic White finish gives it a clean look and holds up nicely in saltwater.

⚠️ Important: Because this is a DEC engine, it has to be installed and programmed by an authorized Yamaha dealer using Yamaha diagnostic tools. It’s not a DIY setup.

Key Features

Why Choose the Yamaha Outboard – LF300ESB4?

Frequently Asked Questions

Q: How does counter-rotation improve handling?

It balances out prop torque between engines, which makes the boat track straighter and reduces drift or pull on the wheel.

Q: Why is a 35-inch shaft useful offshore?

Deep transoms and bigger hulls sit higher, so the extra length keeps the prop in clean water and helps prevent cavitation in big swells.

Q: What’s required for DEC setup?

A Yamaha-certified dealer must install and program the system with Yamaha’s diagnostic tools.

#Model-LF300XCB

Yamaha Outboard – LF300XCB

25-Inch Shaft | Counter Rotation | Digital Electronic Control (DEC) | Electric Start | Power Trim & Tilt | EFI with Variable Camshaft Timing | Gray

The Yamaha LF300XCB is the counter-rotating, 25-inch version of Yamaha’s 4.2-liter V6—built for offshore boats that depend on clean tracking and predictable handling in multi-engine layouts. When paired with a standard-rotation engine, the counter-rotation gearcase helps balance prop torque and makes the boat easier to maneuver, whether you’re running offshore or easing into a dock.

Powered by Yamaha’s 4.2L V6 with Variable Camshaft Timing and EFI, this model delivers sharp acceleration, a strong mid-range, and reliable fuel economy over long runs. The Gray finish offers a rugged, saltwater-ready look, and Yamaha’s corrosion-resistant materials help the engine hold up in harsh marine environments.

⚠️ Important: This Digital Electronic Control engine must be installed and programmed by an authorized Yamaha dealer. Both the outboard and the DEC system require flashing and set-up using Yamaha diagnostic tools. DIY installation isn’t supported.

Key Features

Why Choose the Yamaha Outboard – LF300XCB?

Frequently Asked Questions

Q: Is this model suitable for single-engine boats?

A: It can be used alone, but counter-rotation engines are designed to pair with a standard-rotation unit in multi-engine setups.

Q: How does counter rotation improve performance?

A: It offsets prop torque from the standard-rotation engine, improving steering control, tracking, and docking.

Q: Why must this engine be installed by a dealer?

A: DEC systems require diagnostic programming and flashing, which only authorized Yamaha dealers can perform.

#Model-LF300XCB2

Yamaha Outboard – LF300XCB2

25-Inch Shaft | Counter Rotation | Digital Electronic Control (DEC) | Electric Start | Power Trim & Tilt | EFI with Variable Camshaft Timing | Pearl White

The Yamaha LF300XCB2 is the counter-rotating, 25-inch version of Yamaha’s proven 4.2-liter V6. It’s built for multi-engine offshore setups where balancing steering effort and keeping the boat running straight really matters. The shorter shaft height positions the propeller right where offshore hulls often need it, giving the boat a smoother and more predictable feel.

This engine is powered by Yamaha’s 4.2-liter V6 equipped with Variable Camshaft Timing and Electronic Fuel Injection. It comes out of the hole quickly, holds a strong mid-range, and manages fuel well for long runs offshore. The Pearl White finish brings a clean, upscale look and holds up nicely against UV exposure and saltwater.

⚠️ Important: As a DEC model, this outboard must be installed and programmed by an authorized Yamaha dealer using Yamaha diagnostic tools. Both the engine and the control system require proper flashing during setup. DIY installation isn’t supported.

Key Features

Why Choose the LF300XCB2?

Frequently Asked Questions

Q: Is this model meant for multi-engine setups?

A: Yes. While it can run on its own, counter-rotation engines are designed to work alongside a standard-rotation model.

Q: Why is Pearl White considered a premium finish?

A: It adds a high-end look and provides extra UV and corrosion protection, which is especially useful offshore.

Q: Does the DEC system require dealer installation?

A: Absolutely. DEC engines must be installed and programmed using Yamaha diagnostic tools at an authorized dealer.

#Model-LF300UCB

Yamaha Outboard – LF300UCB

30-Inch Shaft | Counter Rotation | Digital Electronic Control (DEC) | Electric Start | Power Trim & Tilt | EFI w/ Variable Camshaft Timing | Gray

The Yamaha LF300UCB is built for offshore boats that need a counter-rotating engine to balance out a multi-engine setup. If you’re running twins or triples on a bigger hull, this is the motor that helps keep steering from getting heavy and keeps the boat running straighter when the water gets choppy. The 30-inch shaft puts the prop down where it belongs on taller transoms, which really matters once the bow starts moving through swells.

This engine uses Yamaha’s 4.2-liter V6 with VCT and EFI — the same platform that’s been known for strong midrange pull and surprisingly good fuel economy for the power it puts out. It accelerates quickly, holds steady power through the middle, and doesn’t feel strained on heavier offshore hulls. The Gray finish gives it that classic Yamaha look, and it holds up well in saltwater thanks to the coatings and corrosion protection.

⚠️ Important: This is a DEC engine, so it needs to be installed and programmed by a Yamaha dealer using Yamaha diagnostic tools. It’s not a DIY setup.

Key Features

Why Choose the Yamaha Outboard – LF300UCB?

Frequently Asked Questions

Q:Why would I choose a 30-inch shaft?

It’s meant for boats with deeper transoms or heavier offshore hulls where a shorter shaft won’t keep the prop deep enough in the water.

Q:Is this engine okay as a single?

It can be used that way, but counter-rotating models are mainly intended for twin-engine setups to balance torque.

Q:Does the DEC system need special rigging?

Yes. It must be paired with Yamaha DEC components and installed by an authorized Yamaha dealer.

#Model-LF300UCB2

Yamaha Outboard – LF300UCB2

30-Inch Shaft | Counter Rotation | Digital Electronic Control (DEC) | Electric Start | Power Trim & Tilt | EFI with Variable Camshaft Timing | Pearl White

The LF300UCB2 is Yamaha’s counter-rotating 300 HP V6 designed for offshore boats that need steady control and reliable torque balance. In twin-engine setups, the counter-rotation helps the boat track straighter and keeps steering effort from getting heavy. The 30-inch shaft is also a good match for high-transom offshore hulls, giving the prop enough depth to hold its bite even when the water gets rough.

Power comes from Yamaha’s 4.2-liter V6 with Variable Camshaft Timing and EFI, a setup known for strong mid-range push and solid fuel economy. It gets on plane quickly and stays smooth through the midrange. The Pearl White finish looks clean on modern offshore rigs and adds a little extra protection against UV and saltwater exposure.

⚠️ Important: Because this is a DEC model, installation must be done by an authorized Yamaha dealer. Both the engine and the DEC system need to be flashed and programmed using Yamaha’s diagnostic tools.

Key Features

Why Choose the Yamaha LF300UCB2?

Frequently Asked Questions

Q:Can this be used as a single engine?

Yes, although it’s mainly intended for twin-engine setups that need counter-rotation.

Q:What’s different about the Pearl White finish?

It gives the engine a premium look and holds up well in sun and saltwater.

Q:Does this require dealer installation?

Yes. DEC engines must be installed and programmed with Yamaha diagnostic tools.

#Model-LF300ECB

Yamaha Outboard – LF300ECB

35-Inch Shaft | Counter Rotation | DEC (Digital Electronic Control) | Electric Start | Power Trim & Tilt | EFI with VCT | Gray

The Yamaha LF300ECB is built for offshore boats that need extra propeller depth, strong mid-range power, and confident handling in rough water. With its 35-inch shaft, this model is aimed at tall-transom offshore hulls where keeping the prop in clean water makes all the difference. The counter-rotation setup helps balance steering torque when running twins or triples, giving the operator smoother handling at all speeds.

This engine uses Yamaha’s 4.2-liter V6 with Variable Camshaft Timing and EFI, a combination known for quick throttle response, clean acceleration, and good fuel economy for a motor in this class. The Gray finish gives it a clean, factory look and is built to stand up to long-term saltwater use.

⚠️ Important: This is a Digital Electronic Control (DEC) engine. Installation and setup must be performed by an authorized Yamaha dealer. The engine and control system require flashing and programming with Yamaha diagnostic tools. DIY installation is not supported.

Key Features:

  • Engine Type: 4.2L V6, DOHC with Variable Camshaft Timing
  • Horsepower: 300 HP
  • Fuel System: Electronic Fuel Injection (EFI)
  • Controls: Digital Electronic Control (DEC)
  • Start Type: Electric Start
  • Shaft Length: 35"
  • Rotation: Counter Rotation
  • Trim & Tilt: Power Trim & Tilt
  • Color: Gray
  • Alternator: High-output for powering multiple marine electronics
  • Weight: Approx. 562 lbs (dry)

Why Choose the Yamaha LF300ECB?

  • Extra-Long 35" Shaft – Keeps the propeller planted in deep or choppy water
  • Counter-Rotation – Reduces steering torque in multi-engine rigs
  • DEC Precision – Smooth, responsive throttle and shifting
  • Durable Gray Finish – Built for offshore corrosion resistance
  • Long-Term Reliability – Yamaha’s 4.2L platform is known for durability

Need help choosing your engine? Check out our Yamaha engine guide.

Frequently Asked Questions

Q: Why would I choose a 35-inch shaft?
A: It’s meant for boats with higher transoms or offshore conditions where the prop needs to stay fully submerged.

Q: Does this work with standard rigging?
A: It requires Yamaha DEC rigging components, which are sold separately.

Q: Can I install this engine myself?
A: No. It must be installed and programmed by a certified Yamaha dealer using Yamaha diagnostic equipment.

#Model-LF300ECB2

Yamaha Outboard – LF300ECB2

35-Inch Shaft | Counter Rotation | Digital Electronic Control (DEC) | Electric Start | Power Trim & Tilt | EFI with Variable Camshaft Timing | Pearl White

The Yamaha LF300ECB2 is the counter-rotating, extra-long-shaft version of Yamaha’s offshore 300-horsepower V6. It’s built for big boats that need extra prop depth and better steering balance when running twins or triples. With a 35-inch shaft, this motor sits deeper in the water, which helps keep the prop hooked up when the boat is climbing through heavy chop or carrying a serious offshore load.

Powered by Yamaha’s 4.2-liter V6 with Variable Camshaft Timing and EFI, the LF300ECB2 delivers strong acceleration and clean midrange power without drinking fuel unnecessarily. The Pearl White finish gives it a premium look and also holds up well in saltwater thanks to Yamaha’s corrosion-resistant coatings. DEC controls make throttle adjustments and shifting feel smooth and predictable, so the boat responds exactly the way you expect it to.

⚠️ Important: This is a DEC model and must be installed and programmed by an authorized Yamaha dealer using Yamaha diagnostic tools.

Key Features:

Why Choose the Yamaha Outboard – LF300ECB2?

Frequently Asked Questions

Q: Why is a 35-inch shaft useful?

Because it keeps the prop consistently submerged on tall-transom offshore boats, especially in rough water.

Q: Does this outboard come with rigging?

No. DEC rigging components must be purchased separately.

Q: Can this be installed outside a dealership?

No. DEC engines must be installed and programmed by an authorized Yamaha dealer using Yamaha diagnostic tools.

Model

  • LF300ECB
  • LF300ECB2
  • LF300ESB
  • LF300ESB2
  • LF300ESB4
  • LF300UCB
  • LF300UCB2
  • LF300USB
  • LF300USB2
  • LF300USB4
  • LF300XA
  • LF300XCB
  • LF300XCB2
  • LF300XSB
  • LF300XSB2
  • LF300XSB4

Extended Warranty

  • None
  • 12 Month
  • 24 Month
  • 36 Month
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