Yamaha EF2000iS Owners Manual - Page 27

Pre- Every Item Routine operation 6 months 12 months check or 100 Hr or 300 Hr • Check breather hose for cracks or Crankcase breather damage. 1 hose • Replace if necessary. • Decarbonize cylinder head. Cylinder head # • More frequently if necessary. Valve clearance • Check and adjust when engine is cold. # • Check all fittings and fasteners. Fittings / fasteners # • Correct if necessary. The point where abnormality was recognized by use 1 *1·····Initial replacement of the engine oil is after one month or 20 hours of operation. *2·····The air filter element needs to be cleaned more frequently when using in unusually wet or dusty areas Since these items require special tools, data and technical skills, have a Yamaha dealer perform the service. - 22 -