Model YM168F YM177F YM182F YM188F Engine Type 4-stroke,air-cooled OHV gasoline engine BroX stroke(mm) 68x45(2.68x1.77) 77x58 82x64 88x64 Displacemen (cc) 196 270 337 389 Max Torpue 11/2500 17/2500 24/3600 24/2500 Max Output(kW) 4(5.5hp)/3600rpm 6.6(9hp)/3600rpm 8.0(11hp)/3600rpm 9.8(13hp)/3600rpm Fuel Vehicle use and unleaded gasoline Lub.Oil Four stroke excellent quality engine oil or motorcycle oil SAE 10 W-30 Start Mode Recoil type manual starting Dry weight(kg) 16 25 31 31 Dimension (mm) 313x376x335 380x430x410 405x452x450 405x452x450 Model YM170F /FE YM178F/FE YM186F/FE YM186FA/FAE Type Single cylinder,vertical,4-stroke,air cooled Combustion System Direct Injection Bore X Stroke(mm) 70x55 78x62 86x70 86x72 Displacement(cc) 211 296 406 418 Engine Speed(rmp) 3000 3600 3000 3600 3000 3600 3000 3600 1h Output kw (hp) 2.8(3.8) 3.1(4.2) 4.2(5.7) 5.1(7) 6.5(9) 7.3ï¼10ï¼ 7.3(10) 8(11) 12h Output kw (hp) 2.5(3.4) 2.8(3.8) 3.8(5.2) 4.4(6) 6(8.2) 6.5(9) 6.5(9) 7.3ï¼10ï¼ Starting Mode Hand Starting or Electric Stating(Recoil) PTO Shaft Crankshaft or camshaft (Camshaft PTO rpm is 1/2) Fuel Tank Capacity(L) 2.5 3.5 5.5 5.5 Lub. Oil Capacity(L) 0.75 1.1 1.65 1.65 Fuel consumption(g/kwh) 280 288 276 285 275 282 275 282 Dry weight(kg) 27/31 33/38 48/53 48/53 Dimension(mm) 450x370x470 480x440x520 530x510x575 530x510x575