The all new F350 has been several years in design. Built to deliver Yamaha legendary reliability with all the latest outboard technology. This engine is an industry first and stands alone as the only fourstroke V8. It pumps out amazing power and torque across the complete RPM range.
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Bigger is Better.

The F350's 5.3L V8 configuration is designed to easily produce 350 prop shaft horsepower, with less stress and strain on internal engine components than small displacement, high-output boards. Four oversized valves per cylinder increase breathing efficiency and contribute significantly to this engine's power and torque.

Everything's Under Control

Seven different sensors constantly measure vital atmospheric conditions and engine functions to give the Engine Control Module (ECM) the information needed to precisely and instantly adjust the fuel/air mixture for optimum performance.

Variable Cam-shaft timing

This system advances and retards the angle of the intake camshaft to increase valve lift, duration, and overlap in the low- and mid-rpm ranges. This gives the engine substantially greater torque between 2000 ~ 3500 RPM to plane large offshore boats with authority.

Dual In-Bank™ Exhaust with Power Surge Chambers

Yamaha's exclusive In-Bank exhaust means it exits through the centre of the engine between the "V" of th cylinders, rather than on the exterior side, to allow for a more compact shape. The F350 also features dual exhaust with Power Surge Chambers, which help the engine more easily purge the exhaust for greater combustion efficiency and power.

Ultra Strong gear-case

Completely new, it's large, streamlined design incorporates hardened gears and high strength oversized bearings and bearing surfaces to handle the tremendous power of the F350.

Forged motor mounts and oversized bracket

The F350 features four motor mounts made of strong forged aluminum, which means they're compressed in molds for much greater strength than cast aluminum-type mounts. The oversized mounting bracket features the same bolt pattern and centerline as the F250, but uses two additional mounting bolts for a total of six. It is designed to handle the engine's power while minimizing noise and vibration.

Programmable maximum tilt angle

With a simple programming change through the Yamaha Diagnostic System, it's possible to adjust the full tilt-up setting on the F350 to meet the requirements of individual applications.

Variable trolling RPM control

By just pressing a button on the Command Link gauges, the operator can adjust the engine's trolling speed from 600 ~ 1,000 rpm, in 50-rpm increments. This helps provide precise and consistent trolling speeds in wide array.

Ionic combustion sensors

Individual sensors constantly monitor the condition of combustion in each cylinder for incomplete combustion and, should this occur, they immediately signal the ECM to adjust spark timing to correct it.

Direct 'coil-in-cap' ignition

Spark plug caps come with the ignition coils built right in. The result is increased performance and reliability in a much simpler (no hi voltage wires) and more compact design.

Saltwater Series XL™ Propellers

In order to harness the power and torque of Yamaha's F350, Yamaha designed special Saltwater Series XL propellers specifically to move large, heavy offshore boats. With larger diameter and 21% more blade surface area than our Saltwater Series II propellers, they help enable the F350 to deliver up to 45% more thrust than 250hp-class outboards.

Yamaha's new Command Link Digital Electronics Control

Features a built-in redundancy system using an additional Engine Control Module (ECM), which provides for continued operation if ever needed.


Engine TypeV8 (60') Four Stroke
Displacement5.3-liter (5330 cc) (325.3 ci)
Bore & Stroke94 x 96 mm (3.70 x 3.78 in)
RPM Range5,000 - 6,000
Compression Ratio9.6:1
Induction SystemDOHC / 32 valve with Variable Camshaft Timing (VCT)
Alternator Output50A (40A @ 1,000 rpm)
Fuel DeliverySequential multi-point electronic fuel injection
IgnitionTCI, 32-bit ECM with integrated coil-in-cap ignition design
LubricationWet sump
ExhaustIn-Bank™ dual exhaust with Power Surge Chambers
CoolingThermostatic control, water
Gear ShiftCommand Link FNR
Gear Ratio1.73:1 (26/15)

Fuel & Lubrication

Recommended FuelUnleaded Gasoline (Minimum Pump Octane 89)
Recommended OilYamalube 4M FC-W 10W30 or 20W40
Oil Capacity7.8L (8.2 qt)


Shaft Length25in /30in
Dry Weight763 lbs