69J3D119-50123456789Does theengine start?Wet spark plugs?Out ofspecification?Out ofspecification?Failure in starting operationFailure in starting operationCheck the fuel system.Check the condition of the sparkplugs again.Check the compression pres-sure of the combustion chamber.Check the valveclearance.Adjust the valveclearance.NoNoYesYesYesNoNoYesCheck the cylinder head, cylin-der body, and piston assembly.Power unit