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4.3L V6 Offshore F350

V6 4.3L Digital: 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.

three year limited warranty
ultra low emission
helm master compatible

Meet the Lineup

350 HP

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.

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

Weight † 286 kg (629 lbs) / 291 kg (642 lbs) / 296 kg (653 lbs)
Full Throttle RPM Range 5000 ~ 6000 rpm
Fuel Induction System EFI
Recommended Engine Oil Yamalube® 4M (See owner's manual)
Engine Type V6
Displacement 4.3L
Bore x Stroke 96 x 98mm (3.78 x 3.86 in)
Prop Shaft Horsepower 350 @ 6000
Alternator Output at W.O.T. 50 – 70 amp
Compression Ratio 11.0:1
Recommended Fuel Octane 89
Recommended Fuel Filtration Yamaha 10-Micron Fuel / Water Separating Filter (external)
C.A.R.B. Rating 3 Star
Exhaust Through Propeller (Except in Reverse Under 2500 RPM)
Intake 24
Ignition TCI Microcomputer
Spark Plug ILMAR7E-9 / Iridium
Starting System Electric w/ PTT
Lubrication Wet Sump
Engine Oil Capacity 7.9 L/ 7.6 L
Recommended Cooling Thermostatic Control
Ethanol Blend Limit 10% Maximum
Gear Ratio 1.75:1
Gear Shift Forward, Neutral, Reverse
Shaft Length 25" - 30" - 35"
Degree of Tilt 69°
Degree of Trim -3° through +16°
Mounting Centers 28.5"
Steering Integrated, Electric Actuation
Steering Angle (maximum) 32° from center, either direction
Warranty Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial

† Weight refers to shortest shaft length, and is measured without motor oil, gearcase oil and propeller (except models 25 hp and under, which include a standard propeller). All Jet model weights include the jet pump assembly (weight estimated).

350 HP

The 4.3L V6 Offshore F350 is compatible with digital controls and a range of gauges and props to suit your preference for performance, control and the display of data. Explore compatible components below and contact your dealer for rigging expertise.

Compatible Controls

Helm Master® EX
Digital Controls
Mechanical Controls-Offshore N / A
Mechanical Controls
Multi-Function Tiller Handle N / A
Multi-Function Tiller Handle

Compatible Gauges

CL5 Touchscreen Display
Digital and Analog Gauges

Prop Selector

Enter your details. Find the right prop. Easily zero-in on the best propeller options based on your type of craft, horsepower and performance goals with this smart, online tool.

visit yamaha prop selector
Boat Model:
Engine:
Bulletin:
Bennington 25QSBA
F350XSA
View
Boat Model:
Engine:
Bulletin:
Regal LX6
F350XSA2
View
Boat Model:
Engine:
Bulletin:
Tidewater 3100 Carolina Bay
F350XSA2 / LF350XSA2
View
Boat Model:
Engine:
Bulletin:
Freeman 37 VH
LF350USA2 / F350USA2 / LF350USA2 / F350USA2
View
Boat Model:
Engine:
Bulletin:
Regal 38 SAV
LF350XSA2 / F350ESA2 / F350XSA2
View
Boat Model:
Engine:
Bulletin:
Bennington 27QXSBWAX2
LF350XSA2 / F350XSA2
View
Boat Model:
Engine:
Bulletin:
Key West 291FS
F350XSA2 / LF350XSA2
View
Boat Model:
Engine:
Bulletin:
Sea Pro 322 Offshore
F350XSA2 / LF350XSA2
View
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LIGHTEST

IN ITS CLASS

The new, 4.3L V6 Offshore F350 offers the best power-to-weight in its class, coming in more than 65 pounds lighter than comparable outboards.

Features & Benefits

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.

CHARGING POWER

Our 4.3L V6 Offshore F350’s 70-amp alternator produces more than 30 net amps per outboard at idle—nearly double that of Yamaha’s other comparable outboards.

MORE POWER

Iridium spark plugs work together with Yamaha’s new fuel injection control mapping to produce a lengthened injector duration for more power.

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.

RELIABILITY & DURABILITY

OPTIMIZED CURRENT AND COOLING

A new cowling exhaust port and stator fan keeps everything under the cowling nice and cool, maximizing available net charging power at all RPM, especially in the lower RPM ranges. The cooling effect is impactful enough to create more available current for the new 4.3L V6 F350 over the 4.2L V6 F300 at all RPM.