[wptabs] [wptabtitle]Overview[/wptabtitle] [wptabcontent]

Here’s what makes each member of the Yamaha Midrange family unique:

F90
Features a 16-valve, Double Overhead Camshaft (DOHC) design for incredible acceleration, and Precision Multi-Point Fuel Injection for reliable starts and outstanding fuel efficiency. The F90 is the only Yamaha Midrange with an optional 25-inch shaft.

F75
The F75 features a 16-valve DOHC (Double Overhead Camshaft) design and Precision Multi-Point Fuel Injection for outstanding acceleration and efficiency. It offers many of the same advantages as the F90, in a lower horsepower and with a standard 20-inch shaft.

F70 (NEW)
Weighing in at up to 142 pounds lighter than its four stroke competitors, this 16-valve SOHC (Single Overhead Camshaft) midrange four stroke offers the greatest power-to-weight ratio in its class. That makes it perfect for lightweight fishing boats, pontoons and fiberglass boats. In addition, it’s Command Link® and YCOP™ compatible.

F50/F60
These SOHC midranges feature Precision Multi-Point Fuel injection, for quick starts, superior performance and maximum efficiency. Coupled with a multi-function tiller handle, you won’t find a better addition to your bass or aluminum fishing boat.

F40
This versatile four stroke blends power and fuel efficiency with quiet performance and quick starts. It’s great for skiffs, jons, inflatables and small pontoons.

F25
This midrange workhorse offers responsive power and solid fuel efficiency in a compact package. It features smart engineering conveniences, like the new Nitro Assist Tilt for effortless tilt on both electric and manual start tiller models, and our PrimeStart™ system, for reliable, turnkey starts in hot or cold conditions. Available with a 20-inch shaft (standard on all Yamaha midranges), or a 15-inch shaft for skinnier water, it’s great for skiffs, jons, inflatables and flats boats.

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[/wptabcontent] [wptabtitle]Standard Features[/wptabtitle] [wptabcontent]

Midrange Features

S = Standard Features   ○ = Optional Equipment   ● = Available with or without   R = Required   C = Compatible

Power/Performance F90 F75 F70 F60 F50 F40 F25
Four Stroke Engine Design S S S S S S
SOHC S S S S
Counter Balance Technology S
Long Span Mount System S
Tuned Intake Manifold S
Labyrinth Exhaust S S S S S S
Light Weight Compact Design S
Precision Multi-Point Fuel Injection S
Three-Cylinder Design S
Single Throttle Valve S
Oil/Fuel Separator S S S
Long Track Induction System S S S S S
Dual Stage Single Cylinder Power Trim and Tilt S S S
Powerful 4 Cylinder 60.8 cu in. S S S
Multi-Point Precision Fuel Injection  S S S S S
Four Independent Fuel Injectiors  S S S S
Lightweight, SOHC (Single Overhead Camshaft), 16-Valve Design S
Blow-By Gas Reburning System S
Tuned Long Track Induction System S
Fuel Vapor Burning System S
Powerful 4-Cylinder 97 cu in. S S
DOHC (Double Overhead Camshaft) S S
4-Valves Per Cylinder S S
Compact, Lightweight Design S S

Reliability/Durability
CDI Microcomputer S S
Engine Warning System S S S S S S S
Wet Sump Lubrication S S S S S S S
Thermostatic Controlled Cooling S
YDC-30 Aluminum Alloy S S S S S S S
ACP-221 Paint Process S S S S S S S
Sacrificial Anodes S S S S S S S
High Output Alternator S S S S S S
SST Drive, Prop, Shift Shafts S S S S S S S
SST Steering Tube S S S S S S
Magnetic Drain Plug S S S S S S S
High Output Alternator on “T" Models ?
Single Throttle Valve S S S S S
TCI Microcomputer S S S S S
Electro-deposited Powerhead Paint Process S S S S S
On-Engine Fuel/Water Separating Filter* S S
Water Draining Air Intake Duct S
Direct Drive System S  S
Top Mounted Electical S  S

Convenience/Control
Power Trim and Tilt “LA" Model S S
Spin On Oil Filter S S S S
PrimeStart™ S
Auto Decompression Device S
Freshwater Flush S S S S S S
External Tilt Switch “LA" Model S
Steering Friction lever (Tiller Handle Models) S
Nitro-Assist (“LEHA" model) S
Anti-Splash Plate A
External Tilt Switch S S S S S A
Power Trim & Tilt S S S S S
Command Link® System o
Long Span Mounting System S
Labryinth Exhaust S
Yamaha Diagnostic System C
Easy Maintenance S S
New Style Rigging Grommet S S

[/wptabcontent] [wptabtitle]Power and Performance[/wptabtitle] [wptabcontent]

Fuel Economy

Precision Multi-Point Fuel Injection (except F25) uses individual fuel injectors and a system of on-engine sensors to deliver an optimal fuel/air mixture to each cylinder. F25 models use our PrimeStart™ auto-enrichment system. Both provide easy turnkey starting, smooth acceleration and maximum fuel economy.

Powerful Hole Shot

The Composite Intake Manifold, on midranges F90 through F40, features long tube intake tracks, tuned to increase airflow, which boosts low-end and midrange torque. This means a more powerful hole shot and increased acceleration. Even with all this responsive power, an air silencer box and surge tank reduce air intake noise and air turbulence for smooth, quiet operation.

Optimum Overall Performance

Microcomputer Ignition, featured in all Yamaha midranges, adjusts timing to maintain optimal engine performance, economy and power under all operating conditions.

Smart Design

A Single Overhead Camshaft (SOHC), on the F25 through the F70, provides a compact, lightweight, space-saving design that won an Innovation Award from Motor Boating and Sailing magazine.

Precise Valve Timing

Double Overhead Camshaft (DOHC), on the F75 through the F90, features four valves per cylinder. Valves are activated through direct contact with the camshaft, for more precise valve timing control. Rocker arms and their adjustment are eliminated for increased reliability and less maintenance.

Ultra-Low Emissions

All of Yamaha’s midranges are California Air Resources Board (C.A.R.B.) Three-Star Rated for Ultra-Low Emissions and meet all federal EPA requirements.

[/wptabcontent] [wptabtitle]Reliability and Durability[/wptabtitle] [wptabcontent]

Anti-Corrosive Design

A Top-Mounted Flywheel helps to protect sensitive electrical components from harmful corrosion.

Warranty Protection

All Yamaha four strokes are protected by our Three-Year Limited Warranty for pleasure use. Beyond that, Yamaha Extended Service (Y.E.S.) plans are available, for continued coverage after your three-year factory warranty expires.

Extended Engine Life

A Freshwater Flush Device allows you to flush the engine without running it, for added convenience and long engine life.

Anti-Corrosive Barrier

Our exclusive YDC-30 Alloy is one of the most corrosion-resistant base material in the industry. Used with our proprietary ACP-221 Paint Process, it provides an extra-tough barrier against corrosion. These measures are both key components of our renowned Ultimate Corrosion Protection System, which is standard on all Yamaha midrange four strokes.

[/wptabcontent] [wptabtitle]Convenience and Control[/wptabtitle] [wptabcontent]

Fuel Economy

Precision Multi-Point Fuel Injection (except F25) uses individual fuel injectors and a system of on-engine sensors to deliver an optimal fuel/air mixture to each cylinder. F25 models use our PrimeStart™ auto-enrichment system. Both provide easy turnkey starting, smooth acceleration and maximum fuel economy.

Smooth Operation

A simple Single Throttle Valve design is lightweight and allows for quick, easy adjustment. The air silencer box on the F75 and F90 reduces intake air noise to a minimum with the use of a highly porous nylon cloth that soaks up the noise making these engines whisper quiet while the surge tank reduces air turbulence for smoother operation.

Ergonomic Control

Yamaha’s award-winning, Multi-Function Tiller Handle is available on all midrange models. On models F40 up to F90, the handle features Variable Trolling Speed (VTS™), allowing you to fine tune your trolling speed in 50-RPM increments with the touch of a button.

Power to Spare

A High Output Alternator keeps your batteries charging even when you’re running multiple electronics for long periods of time. This allows you to focus on the fishing—not the batteries.

Trolling Control

Variable Trolling RPM, available on the F40 up to the F90 models, allows you to fine-tune your trolling speed in 50-RPM increments (between 550 and 1000 RPM depending on the model). Then, lock it in with the touch of a button on an optional Command Link® tachometer or optional Multi-Function Tiller Handle.

Easy Engine Flushing


A Freshwater Flush Device allows you to flush the engine without running it, for added convenience and long engine life.

Effortless Tilt

The F25 electric and manual start tiller models now feature Nitro Assist Tilt. These gas charged struts, similar to those that lift a car hatchback, make tilting almost effortless.

[/wptabcontent] [wptabtitle]F90 Specifications[/wptabtitle] [wptabcontent]

F90 Specifications

Engine Type In-Line 4 Cylinder
Displacement 97 ci (1596 cc)
Bore x Stroke 79 x 81.4mm (3.11 x 3.20in)
Prop Shaft Horsepower 90hp @ 5500rpm
Compression Ratio 9.6:1
Fuel/Induction System EFI (DOHC)
Exhaust Through Propeller
Intake Single Throttle Valve
Ignition System TCI Micro Computer
Spark Plug LFR5A-11-00-000
Alternator Output 25A
Starting System Electric
Lubrication Wet Sump
Engine Oil Capacity 3.7L/3.5L w/without filter
Full Throttle RPM Range 5000 – 6000
Cooling Water/Thermostatic Control
Recommended Engine Oil Yamalube® 4M (See owner’s manual)
Recommended Fuel Regular Unleaded (Minimum Pump Octane 87)
Recommended Fuel Filtration Yamaha 10-Micron Fuel/Water Separating Filter (external)
Ethanol Blend Limit 10% Maximum
Gear Ratio (25:11) 2.27:1
Gear Shift Forward, Neutral, Reverse
Shaft Length L = 20″ X = 25″
Degree of Tilt 70°
Degree of Trim -4° through +16°
C.A.R.B. Rating 3-Star
Dry Weight 25″ shaft / 169 kg (372 lbs) ; 20″ shaft / 166 kg (366 lbs)
Steering Angle (maximum) 35° from center, either direction
Warranty 3 Year Limited Pleasure Boat – 1 Year Limited Commercial
Spec Weight 1
[/wptabcontent] [wptabtitle]F75 Specifications[/wptabtitle] [wptabcontent]

F75 Specifications

Engine Type In-Line 4 Cylinder
Displacement 97 ci (1596 cc)
Bore x Stroke 79 x 81.4mm (3.11 x 3.20in)
Prop Shaft Horsepower 75 @ 5500rpm
Compression Ratio 9.6:1
Fuel/Induction System EFI (DOHC)
Exhaust Through Propeller
Intake Single Throttle Valve
Ignition System TCI Micro Computer
Spark Plug LFR5A-11-00-000
Alternator Output 25A
Starting System Electric
Lubrication Wet Sump
Engine Oil Capacity 3.7L/3.5L w/without filter
Full Throttle RPM Range 5000 – 6000
Cooling Water/Thermostatic Control
Recommended Engine Oil Yamalube® 4M (See owner’s manual)
Recommended Fuel Regular Unleaded (Minimum Pump Octane 87)
Recommended Fuel Filtration Yamaha 10-Micron Fuel/Water Separating Filter (external)
Ethanol Blend Limit 10% Maximum
Gear Ratio (25:11) 2.27:1
Gear Shift Forward, Neutral, Reverse
Shaft Length L = 20″
Degree of Tilt 70°
Degree of Trim -4° through +16°
C.A.R.B. Rating 3-Star
Dry Weight 166kg (366 lbs)
Steering Angle (maximum) 35° from center, either direction
Warranty 3 Year Limited Pleasure Boat – 1 Year Limited Commercial
Spec Weight 2
[/wptabcontent] [wptabtitle]F70 Specifications[/wptabtitle] [wptabcontent]

F70 Specifications

Engine Type 16-Valve, SOHC In-Line Four Cylinder
Displacement 60.8 ci (966 cc)
Bore x Stroke 65 x 75mm (2.56 x 2.95 in)
Prop Shaft Horsepower 70hp at 5800rpm
Compression Ratio 9.4:1
Fuel/Induction System EFI/SOHC/4 Valves Per Cylinder
Exhaust Through Propeller
Intake Single Throttle Valve
Ignition System TCI Micro Computer
Spark Plug LKR7E-000-0000
Alternator Output 17AMP
Starting System Electric w/PTT
Lubrication Wet Sump
Engine Oil Capacity 2.1L/ 1.9L w/without filter
Full Throttle RPM Range 5300 – 6300
Cooling Water/Thermostatic Control
Recommended Engine Oil Yamalube® 4M (See owner’s manual)
Recommended Fuel Regular Unleaded (Minimum Pump Octane 87)
Recommended Fuel Filtration Yamaha 10-Micron Fuel/Water Separating Filter (external)
Ethanol Blend Limit 10% Maximum
Gear Ratio (28:12) 2.33:1
Gear Shift Forward, Neutral, Reverse
Shaft Length L = 20″
Degree of Tilt 65°
Degree of Trim -4° through +16°
C.A.R.B. Rating 3-Star
Dry Weight 117 kg (257 lb)
Steering Angle (maximum) 40° from center, either direction
Warranty 3-Year Pleasure, 3-Year Government, 1-Year Commercial
Spec Weight 3
[/wptabcontent] [wptabtitle]F60 Specifications[/wptabtitle] [wptabcontent]

F60 Specifications

Engine Type In-Line 4 Cylinder
Displacement 60.8 ci (996 cc)
Bore x Stroke 65 x 75mm (2.56 x 2.95 in)
Prop Shaft Horsepower 60hp @ 5500rpm
Compression Ratio 9.5:1
Fuel/Induction System EFI (SOHC)
Exhaust Through Propeller
Intake Single Throttle Valve
Ignition System TCI Micro Computer
Spark Plug DPR6E-B9-00-000
Alternator Output 17A
Starting System Electric
Lubrication Wet Sump
Engine Oil Capacity 2.1L/ 1.9L w/without filter
Full Throttle RPM Range 5000 – 6000
Cooling Water/Thermostatic Control
Recommended Engine Oil Yamalube® 4M (See owner’s manual)
Recommended Fuel Regular Unleaded (Minimum Pump Octane 87)
Recommended Fuel Filtration Yamaha 10-Micron Fuel/Water Separating Filter (external)
Ethanol Blend Limit 10% Maximum
Gear Ratio (24:13) 1.85:1
Gear Shift Forward, Neutral, Reverse
Shaft Length L = 20″
Degree of Tilt 69°
Degree of Trim -4° through +20°
C.A.R.B. Rating 3-Star
Dry Weight 113kg (249 lbs)
Steering Angle (maximum) 40° from center, either direction
Warranty 3-Year Pleasure, 3-Year Government, 1-Year Commercial
Spec Weight 4
[/wptabcontent] [wptabtitle]F50 Specifications[/wptabtitle] [wptabcontent]

F50 Specifications

Engine Type In-Line 4 Cylinder
Displacement 60.8 ci (966 cc)
Bore x Stroke 65 x 75mm (2.56 x 2.95in)
Prop Shaft Horsepower 50hp @ 5500rpm
Compression Ratio 9.5:1
Fuel/Induction System EFI (DOHC)
Exhaust Through Propeller
Intake Single Throttle Valve
Ignition System TCI Micro Computer
Spark Plug DPR6E-B9-00-000
Alternator Output 17A
Starting System Electric
Lubrication Wet Sump
Engine Oil Capacity 2.1L/ 1.9L w/without filter
Full Throttle RPM Range 5000 – 6000
Cooling Water/Thermostatic Control
Recommended Engine Oil Yamalube® 4M (See owner’s manual)
Recommended Fuel Regular Unleaded (Minimum Pump Octane 87)
Recommended Fuel Filtration Yamaha 10-Micron Fuel/Water Separating Filter (external)
Ethanol Blend Limit 10% Maximum
Gear Ratio (24:13) 1.85:1
Gear Shift Forward, Neutral, Reverse
Shaft Length L = 20″
Degree of Tilt 69°
Degree of Trim -4° through +20°
C.A.R.B. Rating 3-Star
Dry Weight 113kg (249 lbs)
Steering Angle (maximum) 40° from center, either direction
Warranty 3 Year Limited Pleasure Boat – 1 Year Limited Commercial
Spec Weight 5
[/wptabcontent] [wptabtitle]F40 Specifications[/wptabtitle] [wptabcontent]

F40 Specifications

Engine Type Three-Cylinder In-Line
Displacement 45.6 ci (747 cc)
Bore x Stroke 65 x 75mm (2.56 x 2.95 in)
Prop Shaft Horsepower 40 hp @ 5500 rpm
Compression Ratio 9.4:1
Fuel/Induction System EFI (SOHC)
Exhaust Through Propeller
Intake Single Throttle Valve
Ignition System CDI Micro Computer
Spark Plug DPR6EA-900-000
Alternator Output 12V-16 Amp with Rectifier Regulator (standard)
Starting System Electric
Lubrication Wet Sump
Engine Oil Capacity 1.7L/ 1.5L w/ without filter
Full Throttle RPM Range 5000 – 6000
Cooling Water/Thermostatic Control
Recommended Engine Oil Yamalube® 4M (See owner’s manual)
Recommended Fuel Regular Unleaded (Minimum Pump Octane 87)
Recommended Fuel Filtration Yamaha 10-Micron Fuel/Water Separating Filter (external)
Ethanol Blend Limit 10% Maximum
Gear Ratio (26:13) 2.00:1
Gear Shift Forward, Neutral, Reverse
Shaft Length L = 20″
Degree of Tilt PTT Models: 66° Nitro-Assist: 65°
Degree of Trim -3° through +20° on “PTT" models. 5 postions on Nitro-Assist
C.A.R.B. Rating 3-Star
Dry Weight F40LA = 97kg (214 lbs) F40LEHA 101kg (223 lbs)
Steering Angle (maximum) 40° from center, either direction
Warranty 3-Year Pleasure, 3-Year Government, 1-Year Commercial
Spec Weight 6
[/wptabcontent] [wptabtitle]F25 Specifications[/wptabtitle] [wptabcontent]

F25 Specifications

Engine Type Two-Cylinder In-Line
Displacement 30.4 ci (498 cc)
Bore x Stroke 65.0 mm x 75.0 mm (2.56 x 2.76 in)
Prop Shaft Horsepower 25 hp @ 5500 rpm
Compression Ratio 9.4:1
Fuel/Induction System SOHC
Exhaust Through Propeller
Intake Carburetor
Ignition System CDI Micro Computer
Spark Plug DPR6EA-900-000
Alternator Output 12V-13 Amp with Rectifier Regulator
Starting System M=Manual/ E=Electric
Lubrication Wet Sump
Engine Oil Capacity 1.6L/1.4L without filter
Full Throttle RPM Range 5000 – 6000
Cooling Water/Thermostatic Control
Recommended Engine Oil Yamalube® 4M (See owner’s manual)
Recommended Fuel Regular Unleaded (Minimum Pump Octane 87)
Recommended Fuel Filtration Yamaha 10-Micron Fuel/Water Separating Filter (external)
Ethanol Blend Limit 10% Maximum
Gear Ratio (27:13) 2.08:1
Gear Shift Forward, Neutral, Reverse
Shaft Length S: 15″, L: 20″
Degree of Tilt Manual: Up to 73° w/ 2-position Shallow Water Drive. PTT: Up to 73°
Degree of Trim Manual : 5 Tilt Pin Positions PTT: -3° through +16°
C.A.R.B. Rating 3-Star
Dry Weight F25SMHA = 76kg (168lbs) F25SEHA = 79kg (174 lbs) F25SEA = 77 kg (170 lbs) F25LEA = 78kg (172 lbs) F25LA = 81kg (179 lbs) F25LMHB = 79kg (175 lbs) F25LEHB = 82kg (181 lbs)
Steering Angle (maximum) 42° from center, either direction
Warranty 3-Year Pleasure, 3-Year Government, 1-Year Commercial
Spec Weight 7
[/wptabcontent] [wptabtitle]Photos[/wptabtitle] [wptabcontent] [/wptabcontent] [/wptabs]

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