ROBIN Subaru Engine Type EX 21D Specifications Model : EX 21D Type : Air-cooled, 4-cycle, slant single cylinder, OHC, horizontal PTO shaft Bore x Stroke mm( in.) : 67x60( 2.64x2.36) Piston displacement ml( cu.in) : 211( 12.87) Continuous output : 3.2( 4.4) / 3000 kW( HP) / rpm 3.7( 5.0) / 3600 Maximum output kW( HP) / rpm : 5.1( 7.0) / 4000 Maximum torque : 13.9[ 1.41] ( 10.26) / 2500 Nû m[ kgfû m] ( lbfû ft) / rpm Directon of rotation : Counter clockwise as viewed from PTO shaft side Fuel : Automobile( unleaded) gasoline Fuel Tank capacity liter( US gal.) : 3.2( 0.85) Lubricant : Engine oil SAE 10W-30, 20W, 30W Lubrication : Mechanical splashing type Lubricationg oil capacity : 0.6( 0.156) liter( US gal.) Carburetor : Float type lgnition system : Transistorised Spark plug : NGK BR6HS Governor : Centrifugal flyweight type Dry weight Kg( Ib) : 16( 35.28) Dimension - : 311x366x335 length x width x height mm( in) ( 12.24x14.41x13.19)