Operation WP 1550A/AWwpm_tx001131gb.fm 204. Operation4.1 Recommended FuelThe engine requires regular grade unleaded gasoline. Use only fresh, clean gasoline. Gasolinecontaining water or dirt will damage fuel system. Consult engine owner’s manual for complete fuelspecifications.Use of oxygenated fuelsSome conventional gasolines are blended with alcohol. These gasolines are collectively referred toas oxygenated fuels. If you use an oxygenated fuel, be sure it is unleaded and meets the minimumoctane rating requirement.Before using an oxygenated fuel, confirm the fuel's contents. Some states and provinces requirethis information to be posted on the fuel pump.The following is the Wacker Neuson approved percentage of oxygenates:ETHANOL - (ethyl or grain alcohol) 10% by volume. You may use gasoline containing up to 10%ethanol by volume (commonly referred to as E10). Gasoline containing more than 10% ethanol(such as E15, E20, or E85) may not be used because it could damage the engine.If you notice any undesirable operating symptoms, try another service station, or switch to anotherbrand of gasoline.Fuel system damage or performance problems resulting from the use of an oxygenated fuelcontaining more than the percentages of oxygenates mentioned above are not covered underwarranty.4.2 Before Starting4.2.1 Read and understand the safety and operating instructions at thebeginning of this manual.4.2.2 Check:• Oil level in the engine• Fuel level• Condition of the air cleaner• Tightness of the external fasteners• Condition of the fuel lines