Yamaha F350 4Stroke V8 Outboard Motor

Yamaha F350 4Stroke V8 Outboard Motor is a high-performance marine outboard engine from Yamaha, widely used in offshore fishing boats, commercial vessels, and large pleasure craft because of its power, reliability, and modern technology.

   Engine Specs & Key Features

Engine Type

• 4-Stroke V8 — 60° V-8 configuration for smooth, powerful performance.

     Power & Displacement

• Horsepower: 350 hp (257.4 kW) at ~5500 rpm.

• Displacement: ~5.3 L (5330 cm³).

• Compression Ratio: ~9.6:1.

      Internal Design

• DOHC (Double Overhead Camshaft) with 32 valves (4 per cylinder).

• Variable Camshaft Timing (VCT) — improves torque delivery and efficiency.

• Sequential Multi-Point Fuel Injection — precise fuel delivery for performance and economy.

 Performance Features

• In-Bank™ Dual Exhaust with Power Surge Chambers — enhances torque and power output.

• Electronic Fuel Injection with Long Intake Tracks for efficient breathing and throttle response.

• TCI Ignition with 32-bit ECM for reliable starting and smooth operation.

 Durability & Reliability

Yamaha designed the F350 to be robust and marine-ready, including:

• Big-shaft geartrain and robust motor mounts for heavy-duty applications.

• Electrophoretic corrosion-resistant coating inside the cowling.

• Ionic Combustion Sensor to monitor and optimize combustion.

  Control & Operation

• Command Link® Digital Electronic Control System for smoother throttle and shift.

• Automatic multi-engine RPM synchronization (for twin or triple setups).

• Variable Trolling RPM Control to fine-tune low-speed operation.

• Tilt Limiter to adjust tilt angles for different transoms.

 Physical & Installation Details

• Weight: ~365 kg (varies by model and shaft length).

• Shaft Length Options: Commonly X (25″), U (30″), etc.

• Gear Ratio: ~1.73:1.

 Operation Notes

• Fuel: Uses regular unleaded gasoline (minimum 89 octane).

• Recommended RPM Range: ~5000–6000 rpm for peak power.

• Alternator Output: ~12 V, ~50 A max; useful for charging batteries and powering electronics.