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Fuel Injection for the Frugal PDF Print E-mail
Written by Administrator   
Wednesday, 14 May 2008
Yahama Model F40A - Four-Stroke, 6-Valve SOHC, In-Lind 3-Cylinder
Yahama Model F40A - Four-Stroke, 6-Valve SOHC, In-Lind 3-Cylinder
Yamaha announced a new 40-horsepower four-stroke midrange outboard, internally called the F40A, which will run more efficiently and reliably thanks to the addition of electronic multi-point fuel injection and other improvements from Yamaha’s engineers.

Lone Star Outdoor News was on the water and tested the new engine May 13. The motor we tested was rigged with the command link gauges and they showed at 6100 RPM; 32 mph, the engine was using 7.8 gallons of gas per hour. At a more comfortable cruise speed ( not topped out) we saw 2.0 GPH.

“These outboards are used for every kind of duty imaginable,” said Phil Dyskow, Yamaha Marine Group President. “Whether used on a skiff, a jon boat, an inflatable or a small pontoon, the new F40 will provide value, economy and performance.”

Skinny water guys should take a look at the new engine. The motor comes with a trim and tilt. Truly helpful in shallow water operations. There is also an option to run as jet pump.

The new outboard features an electronic multi-point fuel injection system that works in conjunction with an electronically-controlled single throttle valve, long intake track manifold and 32-bit electronic control module. Together these components optimize efficiency while providing easy starts, quiet performance and smooth, precise throttle control.

Thanks to its new engine control system, the F40 can be rigged with optional Yamaha Command Link® gauges, which can increase customer convenience and control. For example, Command Link features Yamaha’s Variable Trolling RPM (VTS™) switch. With VTS anglers can adjust trolling speed in 50 rpm increments. The F40 can also be rigged with Yamaha’s innovation award- winning Multifunction Tiller Handle.

The F40’s new engine control module also interfaces with Yamaha Diagnostic System (YDS) software to help technicians provide a quick, complete and accurate diagnosis if trouble occurs.



Also under the F40’s sleek, new cowl is built-in water separating fuel filter with a water sensor. When used in conjunction with Yamaha’s mini-10™ fuel filter, the F40 gets the same kind of protection Yamaha’s larger outboards have enjoyed when equipped with Yamaha’s external 10-Micron Water Separating Fuel Filter.

Specifications

   
Model F40A
Type Four-Stroke, 6-Valve SOHC, In-Lind 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 TCI Micro-computer
Spark Plug NGK®DPR6EA-9
Lubrication Wet Sump
Degree of Trim/Tilt -3 to +16/63° w/ PTT (62° w/ Hydro-Assist Manual Tilt
Exhaust Through Propeller Hun
Cooling Raw Water, Thermostatically-controlled
Gear Ratio 2.0:1 (26/13)
Recommended Fuel 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)

Steering System

Yamaha Multifunctional Tiller Handle or Remote Steering Control

Steering Angle (maximum) 40° Each Direction
Weight (dry) Est. 219 lbs.
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
Last Updated ( Thursday, 29 May 2008 )
 
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