Yamaha F4 SMHA Outboard Motor


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buy yamaha f4

The sun just broke the horizon, but your day began hours ago—the second you started your trusty Yamaha Portable. Maybe you’re skimming the marsh in a jon boat during duck season, pushing a sailboat ‘til the wind kicks up or hopping to the cuddy on a tender. Wherever the day takes you, these nimble, lightweight, efficient portables are up for the ride. Available in a range of horsepower from the F20, to the F2.5, including the redesigned F8 with 7.5 percent more displacement, these 1- or 2-cylinder dynamos provide big performance in streamlined designs.

2017 Yamaha F4 SMHA Outboard Motor

  • Labyrinth Exhaust
  • Long Span Mounting System
  • Four Stroke Engine Design
  • Oil Separator
  • Streamlined Gearcase
  • Overhead Valve (OHV) Design
  • 2-Valves Per Cylinder
  • Precise Carburetor Setting
  • Built-in Auxiliary Priming Pump
  • Dynamically Balanced Crankshaft
  • 5-Step Anti-Corrosion Paint Process
  • Stainless Steel Driveshaft, Prop Shaft, Shift Shaft and Steering Tube
  • CDI Microcomputer
  • Sacrificial Anodes
  • Pressurized Lubrication
  • Built-in Fuel Filter


2017 Yamaha F4 SMHA Outboard Motor

Year 2017

Manufacturer Yamaha Marine

Model Name F4

Trim Name SMHA

Generic Type (Primary) Four Stroke


Engine Type One-Cylinder

Engine Power 4 hp at 4500 rpm

Alternator (Output): 6 Amp (Optional: Requires Charging Kit

Displacement 8.5 ci (139 cc)

Gear Ratio (Primary) (27:13) 2.08:1

Lubrication Wet sump

Fuel Type Induction: OHV

Ignition System: CDI

Oil Type (Recommended): Yamalube® 4M (See owner’s manual)

Fuel Type (Recommended): Regular Unleaded (Minimum Pump Octane 87)

Fuel Type (Recommended Filtration): Yamaha Mini 10-Micron Fuel/Water Separating Filter (external)

Steering Angle (Maximun): 90° from center, either direction


Oil capacity .6L (.63 qt)

Spark Plug

Spark Plug CR6HSB-000-000


Note Full Throttle RPM Range: 4000-5000


Length Shaft: S=15″

Bore 2.44 in. (62 mm)

Stroke 1.81 in. (46 mm)


Dry Weight F4SMHA = 27kg (60 lbs)


Starter Manual

Exhaust Above Propeller

Note Ethanol Blend Limit: 10% Maximum

Features C.A.R.B. Rating: 3 Star

Cooling Water/Thermostatic Control

Weight Spec: 6

Note Gear Shift: Forward, Neutral, Reverse

Features Degree of Tilt: 69° | Degree of Trim: 5 positions

Compression Ratio 8.9:1

Intake Design Carburetor

Note Mounting Centers: 28.6″


Warranty 3-year Pleasure, 3-year Government, 1-year Commercial

buy yamaha f4