Yamaha F70LB 70HP Outboard – 20in Shaft

Description

Class-leading power-to-weight ratios make the Yamaha F70LB an absolute necessity for lightweight coastal skiffs. The 16-valve SOHC block breathes massive volumes of air through a 996cc displacement, translating electronic fuel injection data into explosive midrange acceleration. Measuring your exact transom geometry ensures this 70hp remote steer outboard motor fits perfectly without creating excessive lower unit hydrodynamic drag.

Maintain optimal running attitudes dynamically across rough water by engaging the factory power trim and tilt system from your console. You tuck the 115 kg engine inward instantly to push the bow down and slice through morning chop safely. Yamaha casts the midsection using specialized anti-corrosion marine aluminum alloys. This structural barrier stops rapid galvanic decay when repowering premium flats boats in high-salinity coastal environments.

Key Features of Yamaha F70LB

• 1.0-Liter Inline-Four Block: Breathes massive volumes of clean air efficiently, generating 70 horsepower effortlessly to lift light fiberglass hulls onto plane instantly.
• 20-Inch Standard Shaft: Matches standard high-performance transoms perfectly, keeping the gearcase profile tight to maximize top-end running speeds.
• Electronic Fuel Injection: Calculates precise air-fuel ratios continuously, eliminating carburetor hesitation and ensuring crisp throttle response across the 5800 RPM band.
• Remote Mechanical Control: Accepts standard mechanical cables directly from your forward helm, integrating flawlessly with classic steering consoles.
• Hydraulic Power Trim: Adjusts the running angle dynamically via a console switch, optimizing bow attitude across aggressive offshore swells.
• 16-Amp Charging Alternator: Outputs constant electrical current while running, keeping deep cycle batteries topped off for commercial aerators and navigation lights.
• 2.33:1 Gearcase Ratio: Spins aggressive high-pitch propellers efficiently, translating inline-four torque directly into forward vessel momentum.
• Turn-Key Electric Start: Ignites the block instantly via your forward ignition switch, providing car-like starting reliability in freezing weather.
• Anti-Corrosion Castings: Blocks severe galvanic decay physically, protecting the aluminum powerhead block across decades of daily saltwater exposure.
• Clean Four-Stroke Combustion: Eliminates messy two-stroke oil reservoirs, keeping your bilge completely clean while meeting strict clean water standards.

Why Choose Yamaha F70LB

Choosing this specific engine limits installation entirely to 20-inch tall transoms rigged with standard mechanical forward steering wheels. You cannot operate this via a tiller handle safely. Correcting your rigging geometry is a mandatory step when replacing older mechanical outboards.

• Measure the vertical distance from your top transom edge to the keel bottom.
• Install corresponding mechanical control cables sized exactly for your specific boat length.
• Keep coastal waters clean by running highly regulated four-stroke engine configurations.

Ideal Application and Vessel Fitment

This 20-inch remote-steered outboard excels on ultra-lightweight fiberglass skiffs, premium flats boats, and 16-18ft aluminum hulls demanding maximum speed without excessive transom weight. By integrating a proven 996cc displacement block with standard mechanical cable controls, the engine acts as an incredibly reliable mechanical workhorse. The 20-inch shaft ensures the center of gravity remains low, making this lightweight 70hp outboard motor an absolute necessity for fast shallow water fishing.

Warranty, Support and Maintenance

Authorized recreational operation receives a 3-Year Limited Pleasure Warranty alongside exceptional factory support. Registered commercial applications fall under a strict 1-Year Commercial Warranty with separate terms applied to the block. Scheduled maintenance requires replacing gearcase lubricants and changing oil filters at manual-specified intervals. Always save all physical service records. Your engine serial number acts as the only way to source exact genuine replacement parts. Mulmotor provides product-information support before purchase and assistance with order-related questions.