Vintage Kohler K91 Startup. 

I restored this one a while back, this is the first time since.
Model
K91
Type
4-stroke, L-head, single-cylinder
Displacement
145 cm 3 (8.86 cu-in)
Max. horsepower
4.1 PS (3.0 kW; 4.0 HP) at 4,000 rpm
Fuel system
Carburetor (Kohler or Walbro, fixed main jet or adjustable main jet)
Cooling system
Forced-air
Ignition system
Magneto or battery or breakerless ignition system
Lubricating system
Splash type
Starting system
Recoil or electric starter
Fuel used
Unleaded gasoline (octane number 86 or higher)
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