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.

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.

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.