Yamaha F40LEHA User manual

F40A
Performance. Reliability. Convenience and control. Long-term value.
These are the benefits you look for in a mid-range four stroke outboard. At Yamaha, we’re
constantly striving to provide all of these, and more, in every outboard we make. Continuing
this innovative tradition, Yamaha is proud to announce a new member to the Yamaha
outboard family, the F40A.
AVAILABLE
MODELS:
F40LEHA
(F40ELH)**
F40LA
(F40TLR)**
F40JEHA
(F40EJH)**
F40JEA
(F40EJR)**
** See page 7
for explanation
of new model
codes
PERFORMANCE
This new four stroke is a true outboard; engineered, designed, and developed specifically
for the marine environment. It’s three-cylinder, single overhead camshaft design means
powerful performance in a compact package, and that performance is available in both
propeller and jet-driven models to effectively power a myriad of applications and
designs. With a newly-designed single throttle valve, a long intake track manifold,
and an Electronic Control Module these engines feature easy starting, fast
acceleration, and excellent top-end speed while still delivering the
outstanding fuel-efficiency Yamaha outboards are known for.
RELIABILITY
Yamaha’s proven 40hp four-stroke outboard design now comes with the
addition of electronic multi-point fuel injection for easy, turn-key starting.
A large, on-engine water-separating fuel filter further adds to its long-term
reliability approach, as does an integral engine monitoring and warning
system and Yamaha’s renowned Ultimate Corrosion Protection System.
These features help provide the peace of mind that comes standard with
every Yamaha outboard.
CONVENIENCE AND CONTROL
Yamaha’s F40A has met the digital age. Optional Command Link®gauges
can now be rigged to this versatile engine. Even Yamaha’s exclusive Variable
Trolling RPM Switch (VTS™) is standard on Command Link or Multifunction
Tiller Handle-equipped models. The benefit? Ultimate convenience, expansive
available information, great control; all in a compact, easy-to-own-and-operate
package.
VALUE
Enhanced reliability. Exceptionally smooth and quiet operation. Outstanding
fuel efficiency. Maximum performance and convenience. All combine to make
the new Yamaha F40A an incredibly powerful and versatile value, both now
and in the years ahead.
HOT SHEET
YAMAHA MARINE
Effective
July 1, 2008
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F40A Features
F40A HOT SHEET
F40A HOT SHEET
Over-Rev
Limiter
Over-Heat
Warning
Self-Sacrificing
Anodes
Low Oil
Pressure
Warning
Start-In-
Gear
Prevenion
Shift-In-Gear
Prevention in
Open-Throttle
Freshwater
Flushing Device
Special Aluminum
Alloy: YDC30
Long-Span
Mounting System
Large Multi-Function
Tiller Handle (Optional)
Water Draining
Air Intake Duct
Compact/One-Piece
Solid Cowling
Single Action
Steering Friction
(Optional)
Small, Compact PTT
(Standard on
LA Model)
Light Load Hydro
Trim & Tilt System
(Standard on Jet Models)
Command Link®
Gauges
(Optional)
Labyrinth Exhaust
Water-Sealed
Outer Wall
Warning & Protection Systems
Ultimate Corrosion Protection System
Reliability/Durability
Performance Convenience
6-Valve SOHC
In-Line 3-Cylinder
ECM Control System
Electronic Multi-Point
Fuel Injection
Single Throttle Body/
Long Intake Manifold
Variable Trolling RPM
(Option-based)
YDIS: Yamaha
Diagnostic System
Vapor Reduction
System
Closed Fuel
Vapor System
Blow-By Gas
Re-Burning System
Large Water Separator
with Water Sensor
ACP-221
Paint Process
F40A FEATURES

POWWERFUL PERFORMANCE
Yamaha’s new F40A features a vapor-reducing fuel return
system. Used in conjunction with Yamaha’s electronic
multi-point fuel injection, the F40A offers dependable
turn-key starting in both hot and cold conditions.
A single overhead camshaft provides precise valve timing
for maximum power with minimum weight. This 6-valve,
SOHC design efficiently exchanges intake and exhaust
gases for responsive power and fuel efficiency.
Responsive Power
Precise Throttle Control
Fuel Efficiency
Three individual compact electronic fuel injectors deliver the
exact amount of fuel needed for optimum performance and
economy. Controlled by the Engine Control Module via input
from an array of on-engine sensors, their location just above
the intake valves enhances fuel atomization, resulting in
more efficient combustion.
Dependable Starting
All air entering the engine block of the F40A is routed through
a single throttle valve, to ensure the precise amount of air
necessary for optimum power and fuel efficiency. The air
silencer box reduces intake noise and air turbulence for
smooth, quiet operation.
F40A HOT SHEET
F40A HOT SHEET

RUGGED RELIABILITY
Long Term Value
Advanced Technology
Cleaner Fuel
Protection from the Elements
Yamaha improved their legendary Ultimate Corrosion
Protection System for the F40A. Yamaha’s proprietary
alloys, ACP-221 paint process, and freshwater flush device
are just the start. Multiple sacrificial anodes in and on
the power head, mid-section, and lower unit, a special
ACP-221 paint process, and a specially-painted and treated
exhaust system means better long-term protection and
maximum value.
All F40A models 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.
All F40A outboards feature a large, on-engine water
separating fuel filter with a water sensor. Used in
conjunction with Yamaha’s optional boat-mounted
10-Micron Water Separating Fuel Filter, it helps separate
water and contaminants from the fuel before they can
reach the outboard’s other filters and fuel injectors.
The F40A features a proven one-piece cowling with an intake
air drain system, to easily and efficiently drain away any water
that enters the cowling during normal engine operation.
Incoming air is routed through a labyrinth of passages that
help trap and drain water before it enters the engine’s intake,
for maximum reliability.
F40A HOT SHEET
F40A HOT SHEET

CONVENIENCE AND CONTROL
Yamaha’s award-winning Multifunction Tiller Handle
offers the benefits demanded most in a tiller control.
From its front-mounted gear shift and ignition key
switch controls, to the easy-to-use Variable Trolling
RPM Switch, it’s ergonomically-designed to provide
maximum control with maximum comfort.
Precise Trolling Control
Optional Tiller Handle Control
Smooth and Quiet
More Information
Optional Command Link gauges offer a wealth of information
to the operator in order to help provide efficient and effective
operation. Available in square or round style to fit a wide
range of tastes and applications.
By just pressing a button on the Command Link®tachometer
or the VTS™ switch on the Multifunction Tiller Handle,
the operator can adjust the engine’s trolling speed from
650 ~ 900 rpm in 50-rpm increments. This helps provide
precise and consistent trolling speeds in wide array
of conditions.
Engine exhaust is routed through a maze before exiting
above the waterline through the idle exhaust relief outlet
for unbelieveably smooth and quiet operation.
F40A HOT SHEET
F40A HOT SHEET

NEW MODEL CODES
Model Code Changes for F40 Models
In order to simplify Yamaha model codes and the introduction of new models, Yamaha has revised
its model code designators (starting with this all-new engine). Please note that all other Yamaha
engines will retain their current models codes until further notice.
F40A HOT SHEET
F40A HOT SHEET
Current Model Code
New Model Codes - F40A
Examples
F 40 B T X R
Fuel Induction Horsepower Model Code Starting Method Shaft Length Control Method
Designator
F = 4 stroke B = 3 Star T = PTT & E start S = 15" R = Remote control
CARB P = PT & E start L = 20" H = Tiller handle
Rating E = Electric start X = 25"
M = Manual start U =30"
J = Jet
F 40 L E H A
Fuel Induction Horsepower Shaft Length Starting Method Control Method Generation
PTT
F = Four Stroke S = 15” Blank = PTT & E start Blank = Remote A = 1st change on motor
L = 20” P = PT & E start Control B = 2nd change on motor
X = 25” E = Electric start H = Tiller Handle C = 3rd change on motor
U = 30” M = Manual start C = Command Link Etc.
J = Jet Control
F 40 L A
Fuel Induction Horsepower Shaft Length Starting Method Control Method Generation
PTT
F = Four Stroke S = 15” Blank = PTT & E start Blank = Remote A = 1st change on motor
L = 20” P = PT & E start Control B = 2nd change on motor
X = 25” E = Electric start H = Tiller Handle C = 3rd change on motor
U = 30” M = Manual start C = Command Link Etc.
J = Jet Control
F 40 J E H A
Fuel Induction Horsepower Shaft Length Starting Method Control Method Generation
PTT
F = Four Stroke S = 15” Blank = PTT & E start Blank = Remote A = 1st change on motor
L = 20” P = PT & E start Control B = 2nd change on motor
X = 25” E = Electric start H = Tiller Handle C = 3rd change on motor
U = 30” M = Manual start C = Command Link Etc.
J = Jet Control
F 40 J E A
Fuel Induction Horsepower Shaft Length Starting Method Control Method Generation
PTT
F = Four Stroke S = 15” Blank = PTT & E start Blank = Remote A = 1st change on motor
L = 20” P = PT & E start Control B = 2nd change on motor
X = 25” E = Electric start H = Tiller Handle C = 3rd change on motor
U = 30” M = Manual start C = Command Link Etc.
J = Jet Control
Please note all other Yamaha outboard models will continue to use the current model code system at
this time. “Generation” codes will change at such time new Yamaha outboards models are introduced.
Model codes will utilize this new and simpler format at that time.

System Diagram
Air
Fuel
Crank Position Sensor
Throttle Position Sensor
Intake Air Pressure Sensor
Oil Pressure Sensor
Cooling Water Pressure Sensor
Intake Air Temperature Sensor
Cooling Water Temperature Sensor
Fuel Pump
Fuel Injectors
Vapor Separator
Ignition Control
Fuel Control
Battery
ECM
Filter
Hub
Ignition
Key Switch
Command Link®
Speedometer
(Variable Trolling
RPM Switch)
Command Link®
Tachometer
Water Separator
(Water Detection Switch)
Ignition
Key Switch
SYSTEM DIAGRAM
F40A HOT SHEET
F40A HOT SHEET

This document contains many of Yamaha’s valuable trademarks. It may also contain trademarks belonging to other companies. Any references to other companies or their products
are for identification purposes only, and are not intended to be an endorsement.
Due to Yamaha’s ongoing commitment to product improvement, we reserve the right to change without notice, equipment, materials, or specifications.
© 2008 Yamaha Motor Corporation
F40A Specifications
Model F40A
Type Four Stroke, 6-Valve SOHC, In-Line 3-Cylinder
Displacement 747cc (45.6 c.i.)
Bore x Stroke 65.0mm x 75.0mm (2.56 in. x 2.95 in.)
Full Throttle RPM Range 5000 - 6000
Horsepower Rating at Propshaft 40 hp @ 5500 rpm (29.4kw @ 5500 rpm)
Compression Ratio 9.4:1
Fuel Induction/Scavenging Electronic Fuel Injection
Alternator Output 12V-16 Amp with Rectifier Regulator (standard)
Fuel Delivery Electronic Fuel Injection
Starting Method Electric Starter
Ignition CDI Microcomputer (DC)
Spark Plug NGK®DPR6EA-9
Lubrication Wet Sump
Degree of Trim/Tilt -3 to +20/63° w/ PTT (62° w/ Hydro-Assist Manual Tilt)
Exhaust Through Propeller Hub
Cooling Raw Water, Thermostatically-controlled
Gear Ratio 2.0:1 (26/13)
Recommended Fuel Regular Unleaded Gasoline (Minimum Pump Octane 87)
Recommended Oil Yamalube®4-M FC-W®10W-30 or 20W-40
Oil Capacity 2.1 Quarts (2.0L)
Remote Controls Optional Conventional Remote Controls
(Yamaha brand recommended)
Command Link Gauges Optional (square or round)
Variable Trolling Throttle Adjustment +/- 50 RPM Increments (650 ~ 900 RPM Range)
via Command Link tachometer or Yamaha
multifunction Tiller Handle with VTS™ switch
Steering System Yamaha Multifunctional Tiller Handle or
Remote Steering Control
Steering Angle (maximum) 40° Each Direction
Weight (dry) 219 lbs. (estimated)
Shaft Length 20" (L) - Propeller Models
15" (S) - Jet Models (for use on 20” transoms)
C.A.R.B. Emissions Rating 3-Star
Limited Warranty 3-Year Pleasure, 3-Year Government,
1-Year Commercial
F40A SPECIFICATIONS
F40A HOT SHEET
F40A HOT SHEET