Yamaha F350ESA 350HP DEC 35″ Shaft Outboard Motor

The Yamaha F350ESA is a 350hp standard rotation outboard designed with a 35-inch ultra-long shaft for multi-engine offshore boats. This 4.3-liter 60-degree V6 platform produces immense structural density through its 4256 cc displacement while maintaining an optimized dry weight of 653 lbs to maximize pure marine performance. Engineered explicitly for towering deep-V transoms, the 35-inch shaft length helps support ideal propeller depth and balanced tracking across heavy-duty fiberglass hulls navigating rough open ocean waters.

The 5000 to 6000 RPM operating range should be matched to the boat, load, propeller, and intended use. The 1.75:1 gear ratio should be matched with an appropriate propeller and boat setup. under heavy loads. This Japanese-built outboard leverages advanced block harmonics to eliminate low-frequency hull vibrations during severe long-range deep-sea operations.

Technical Specifications of Yamaha F350ESA

- Electronic fuel injection optimizes fuel atomization to deliver high thermal efficiency across all cylinders.
- A heavy-duty 70 gross amp alternator generates power to keep house battery banks charged.
- The fully integrated electric steering mechanism replaces complex hydraulic lines with electronic steering integration.
- The proprietary TotalTilt system simplifies trailing and shallow-water operation by tilting the lower unit clear of the water when used as intended.
- An extensive 6.3-liter oil sump helps support optimal thermal dissipation and continuous lubrication during hard wide-open throttle runs.
- The standard-rotation lower unit helps support traditional clockwise propeller spin for optimized single or primary engine thrust.

VCT Valve Control Architecture

Variable camshaft timing adjusts the intake valves on this 24-valve double overhead camshaft V6 to optimize total thermal efficiency. This engineering process shaves critical response lag off the powerhead while drastically improving torque delivery under severe offshore environments.

Electronic Fuel Induction System

Multi-port electronic fuel injection sprays gasoline straight into the intake tracks for clean combustion cycles on 89 octane fuel. This delivery system is designed to support immediate throttle response and flawless cold starts during changing early morning coastal marine conditions.

Hydrodynamic Gear Housing Profile

Oversized internal gears and a streamlined lower unit maximize hydrodynamic thrust while minimizing underwater drag on high-speed hull alignments. This mechanics minimizes lower-unit chatter while ensuring steady propeller tracking when backing down on game fish.

Integrated Vessel Electronics Control

Digital electronic control networks integrate seamlessly with the electric steering system to handle intensive house power needs automatically. This setup safely coordinates with the charging loop to sustain modern multifunction displays and gyro stabilizers without battery drain.

Offshore Hull Match Application

Mid-to-large offshore center consoles, walkarounds, and express cruisers from 26 to 38 feet are the target vessel application for this 35-inch motor. The ultra-long shaft delivers leverage and structural vibration dampening when driving through steep waves.

Cowling Access And Lubrication

Fast access to critical checking points is provided by a multi-piece outer cowling structure that cuts service times down significantly. Changing the internal fluid volume remains completely clean thanks to an engineered drain plug location that prevents spoiling oil.Maintenance note: Follow the manufacturer’s service procedures and lubrication specifications for the engine and gearcase.