Yamaha F70LB2 70HP 20″ Mechanical Outboard Motor

Description

The Yamaha F70LB2 is a 70hp standard rotation outboard designed with a 20-inch shaft for multi-engine offshore boats. This 1.0-liter inline-4 platform handles extreme high-seas operation by distributing its massive 996 cc displacement over an optimized dry weight of 253 lbs to maximize rigidity. Crafted explicitly for shallow sterns, the 20-inch shaft length ensures complete propeller immersion and continuous bite across coastal center consoles and skiffs navigating open ocean waters.

Sustaining high-speed cruising across extreme tournament distances is easy when running this heavy-duty powerhead within its 5300 to 6300 RPM threshold. The optimized 2.33:1 gear ratio translates massive internal combustion pressures into a sweeping torque curve to lift wide hulls on plane rapidly. Backed by proven Japanese engineering excellence, the propulsion platform provides absolute mechanical consistency for captains operating far beyond standard coastal cell phone service ranges.

Technical Specifications of Yamaha F70LB2

• Multi-point electronic fuel injection pushes gasoline precisely for complete combustion and clean power delivery across the powerband.
• A robust 17-amp gross alternator easily satisfies the electricity demands of modern multi-display helms.
• Remote mechanical steering compatibility removes traditional complex hydraulic links to streamline rigging and responsive vessel tracking.
• The power trim and tilt feature makes trimming easy with a built-in 65-degree maximum tilt path for shallow waters.
• An extensive 2.1-liter oil reservoir ensures components stay thoroughly lubricated during long wide-open throttle runs.
• The standard-rotation lower unit ensures traditional clockwise propeller spin for optimized single or primary engine thrust.

SOHC Sixteen Valve Powerhead

Advanced single overhead camshaft engineering treats the cylinder configurations of this 16-valve inline-4 to optimize overall thermal efficiency. This advanced build path cuts unnecessary pounds from the powerhead block while drastically accelerating thermal dissipation under severe high-load operations.

Multi Point EFI Induction System

Electronic fuel injection pushes fuel straight into the heart of each intake track for complete combustion cycles on 87 octane fuel. This automated network produces crisp throttle recovery and instant starting capability when navigating treacherous inlets or heavy head seas.

Hydrodynamic Heavy Duty Gearset

Oversized drive gears housed inside a hydrodynamic lower unit minimize underwater drag profiles during high-speed cruising maneuvers. This robust engineering dampens heavy gear-shift vibration while maximizing directional tracking on deep-transom multi-engine fiberglass hull configurations.

Pearlescent White Control Loop

Mechanical steering links connect directly with the transom bracket setup to provide reliable helm response and handling. This mechanical platform coordinates with a stable charging loop to supply constant power to critical open-water electronics arrays.

Flats Skiff Integration Matrix

Coastal center consoles, premium flats skiffs, aluminum multi-species fishing boats, and fiberglass runabouts ranging from 16 to 22 feet provide the perfect match. Its 20-inch shaft prevents propeller ventilation when ascending rollers in rough open-ocean swells.

Rapid Fluid Servicing Access Point

Unimpeded maintenance access is guaranteed by a multi-piece cowling array that detaches smoothly for immediate dipstick evaluation. Slick drainage pathways isolate waste fluids to allow for quick oil changes right at the marina slips. Pro Tip from the Shop: Connect your freshwater wash hose directly to the upper flushing port after every trip to automatically blast salt crystals out of the cooling jacket without even starting the engine.