... gasoline engine EY20; 2.Machine design, light weight;. 3.Easy to use, good performance,Long life; 4.CE certificate. ROBIN gasoline engine ... of trolley sprayer,ROBIN gasoline engine EY20,Kerosene engine and water pump,diesel engine & pumps,gasoline vibrator,plate compactor,etc... ... Bore x Stroke67 x 52mmDisplacement183mlCompression ratio8.5:1Max.power output(5HP) 3.7kwRated speed/ output3600rpm/2. ...