Our 747-cc 40-hp midrange provides powerful performance in a compact
package that’s available in both propeller- and jet-pump-driven models.
With its single throttle valve, long-track intake manifold and
electronic control module, it delivers easy starts, fast acceleration
and excellent top-end speed.
POWER & PERFORMANCE
Fuel Economy: Precision
Multi-Point Electronic Fuel Injection delivers the exact amount of fuel
needed for optimum performance and efficiency. Yamaha’s EFI optimizes
fuel atomization further enhancing fuel economy.
Single Overhead Camshaft: A
Single Overhead Camshaft (SOHC), three-cylinder design on the F40 and
F30 provides a compact, lightweight, space-saving design.
Precise Throttle Control: All
air entering the engine block of is routed through a single throttle
valve, to ensure the precise amount of air necessary for optimum power
and fuel efficiency. It then enters each cylinder through individual
long intake tracks, which are ‘pulse tuned’ to provide air at the
precise volume and timing for maximum density and power.
Dependable Starting: The F40
and F30 feature a vapor-reducing fuel return system. Used in conjuction
with multi-point electronic fuel injection, they offer dependable
turn-key starting in hot or cold conditions.
RELIABILITY & DURABILITY
Corrosion Protection: Combined
with our proprietary alloy (YDC-30), our exclusive Phaze Five™
anti-corrosive paint system provides a tough, five-layer barrier against
corrosion. This protection is standard on all Yamaha Midrange
four-stroke engines.
Advanced Technology: The F40
and F30 are equipped with an Engine Control Module that interfaces with
Yamaha Diagnostic System software. This provides a view of selected past
and current running conditions, to help technicians provide a complete
and accurate diagnosis of your engine.
Protection from the Elements: A
proven one-piece cowling with an intake air drain system easily and
efficiently drains water away that enters the cowling. Incoming air is
routed through a labyrinth of passages that help trap water before it
enters the engine’s intake for maximum reliability.
Cleaner Fuel: A large,
on-engine water separating fuel filter with a water sensor is used in
conjunction with the Yamaha optional boat-mounted 10-Micron Water
Separating Fuel Filter. This helps separate water and contaiminants from
the fuel before they can reach the outboard’s other filters and fuel
injectors.
CONVENIENCE & CONTROL
Control and Comfort: Our
optional, award-winning Multi-Function Tiller handle features a Variable
Trolling RPM Switch (VTS®). It allows for precision trolling speed
adjustments in 50-RPM increments. Compatible with all Midrange models.
Easy Engine Flushing: A
Freshwater Flush Device allows you to flush the engine without running
it, for added convenience and extended engine life.
Power Trim and Tilt: Power
trim and tilt models provide a trim range of -3 up to +20 degrees. This
brings the bow of the boat up, for better hole shot and top speed and a
smoother ride.
MODEL SPECIFIC FEATURES
Available for mechanical or tiller-handle control
Only 214 pounds
Available in a 20” shaft
Powerful 17-amp alternator
Optional Variable Trolling RPM
Switch (VTS®) via our Multi-Function Tiller Handle, Command Link®
tachometer or new helm-mounted remote VTS switch
SPECIFICATIONS
Engine Type: 3 cyl
Displacement: 747cc
Bore x Stroke: 65 x 75mm (2.56 x 2.95 in.)
Prop Shaft Horsepower: 40hp at 5500rpm
Full Throttle RPM Range: 5000 ~ 6000 rpm
Alternator Output at W.O.T.: 17 Amp
Compression Ratio: 9.4:1
Fuel Induction System: EFI
Weight*: 97 kg (214 lbs) – 101kg (223 lbs)
Recommended Fuel: Octane 87
Recommended Engine Oil: Yamalube® 4M (See owner’s manual)
† Weight refers to shortest shaft length, and is measured without
motor oil, gearcase oil and propeller (except models 25 hp and under,
which include a standard propeller). All Jet model weights include the
jet pump assembly (weight estimated).
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Our 747-cc 40-hp midrange provides powerful performance in a compact
package that’s available in both propeller- and jet-pump-driven models.
With its single throttle valve, long-track intake manif..
