2025 Yamaha Outboards V6 4.3L 350 hp Base

2025 Yamaha Outboards V6 4.3L 350 hp Base

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  • Year 2025
  • Make Yamaha Outboards
  • Model V6 4.3L 350 hp
2025 Yamaha Outboards V6 4.3L 350 hp Base

2025 Yamaha Outboards V6 4.3L 350 hp Base

2025 Yamaha Outboards V6 4.3L 350 hp

Dark blue water. Miles from land. Nothing but you, your crew and the monsters raring to give you a run for your money. Year after year—your love of the offshore remains unchanged. Your tech on the other hand is always the most advanced—including your outboard. The all-new 4.3L V6 Offshore F350 merges all the best tech from our full line of outboards with some impressive tech of its own. The result is a perfectly balanced, deep breathing V6 that delivers jaw-dropping power and the best power-to-weight in its class—the new, 4.3L V6 Offshore F350.

Weighing in at 629 pounds and delivering an astounding 11:1 compression ratio, the new 4.3L V6 Offshore F350 creates jaw-dropping power in an incredibly light design. In fact, it boasts the best power-to-weight in its class—by more than 65 pounds. Available in Yamaha gray, pearlescent white or new classic white, the 4.3L V6 F350 is the new knockout offshore.

Features may include:
  • Recommended fuel: 89 Octane
  • Shaft lengths available: 25”, 30” and 35”
  • Alternator output: up to 70 amp

Power and Performance

RESPONSIVE POWER

It’s center-mounted 81mm electronic throttle valve is eight percent larger than the F300. Flanked by identical port and starboard intake manifolds, it creates a well-balance design, smooth air flow and responsive power.

INCREASED COMBUSTION

A camshaft profile with a higher valve lift allows for longer opening duration for intake and exhaust. Combined with reimagined valve lifters, it creates precise clearance for increased combustion.

MAX TORQUE

A new clutch dog design, machined with more teeth, increases torque transfer from powerhead to propeller.

Convenience and Control

More Functionality / Security

Helm Master® EX includes Autopilot with Heading/Course Hold, 10+ automated modes for fishing and relaxing, in-mode joystick adjustability and the expanded ability to control up to five outboards. There’s even an optional theft-deterrent system, Y-COP®, which disables the ignition and fuel systems while docked.

FAST, EASY TILTING

A Yamaha exclusive, TotalTilt® performs a quick, full trim up or down with the fast, double-tap of a button. This makes trailering quick and easy and is handy when a complete up or down tilt is needed.

POWERFUL, PRECISE MANEUVERING

Thrust Enhancing Reverse Exhaust keeps exhaust bubbles away from the propeller below 2500 RPM and when in reverse. This means the prop bites only clean water, which results in outstanding reverse thrust and control—especially when backing down on fish and when maneuvering around docks.

Engine

Engine Type V6
Engine Power Prop Shaft: 350 hp@ 6000 rpm
Displacement 4.3L
Bore 3.78 in (96 mm)
Stroke 3.86 in (98 mm)
Compression Ratio 11.0:1
Throttle Full RPM Range: 5000 ~ 6000 rpm
Steering Integrated, Electric Actuation | Angle (maximum): 32° from center, either direction
Exhaust Through Propeller (Except in Reverse Under 2500 RPM)
Ignition TCI Microcomputer
Oil Type Recommended: Yamalube® 4M (See owner's manual)
Lubrication Wet Sump
Cooling Recommended: Thermostatic Control
Gear Ratio (Primary) 1.75:1
Gear Shifter Forward, Neutral, Reverse
Induction EFI

Spark Plug

Spark Plug ILMAR7E-9 / Iridium

Electric

Starter System: Electric w/ PTT
Alternator Output, Maximum Output at W.O.T.: 50 – 70 amp

Fuel System

Fuel System Ethanol Blend Limit: 10% Maximum
Fuel Type Recommended: Octane 89 | Recommended Filtration: Yamaha 10-Micron Fuel / Water Separating Filter (external)

Dimensions

Length Shaft: 25" - 30" - 35"
Dimensions Degree of Tilt: 69° | Degree of Trim: -3° through +16° | Mounting Centers: 28.5"

Capacities

Oil capacity 7.9 L/ 7.6 L

Weights

Weight 629 lbs (286 kg) /642 lbs (291 kg) /653 lbs (296 kg)

Features

Features Intake: 24 | C.A.R.B. Rating: 3 Star

Warranty

Warranty Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial

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