F4SMHA Yamaha 4 Stroke

F4SMHA Yamaha 4 Stroke

Lightweight, compact and economical, Yamaha’s single-cylinder portable F4 has been designed to be ultra-easy to use and transport. Featuring a specially developed four stroke, Overhead Valve (OHV) design, this engine delivers excellent fuel efficiency and smooth running. Attention to detail makes this Yamaha small engine great by delivering a user experience that stands head and shoulders above anything else.


  • Engine Type4-Stroke, OHV, 1-cylinder
  • Bore x Stroke (mm)62 x 46
  • Fuel Tank Capacity (l)1.1
  • Displacement (cc)139.0
  • Recommended Maximum RPM4000-5000
  • Fuel ManagementCarb
  • IgnitionCDI
  • Lubrication SystemWet sump
  • Alternator Output12V - 6A with Rectifier Regulator (Optional)
  • Gear Ratio2.08:1
  • Starter SystemManual Choke
  • Operation MethodTiller Handle
  • Trim and Tilt MethodManual Tilt
  • Digital GaugesN/A
  • Command Link GaugesN/A
  • Transom Height (mm [inch])S: 435 [17.1] | L: 562 [22.1]
  • Dry Weight (kg)S: 27 | L: 28

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