Maintenance Manual ULPOWER UL390i UL390iS UL390iSAMM 390A01 Revision No: 2 Date: 2014-09-15 Page: 3 of 18Table of contentsPreface ..................................................................................................................1Remarks ............................................................................................................... 1Modifications ......................................................................................................... 1Engine serial number ............................................................................................... 1Repeating symbols .................................................................................................. 1Safety information ....................................................................................................2Table of contents .....................................................................................................3General ..................................................................................................................4Authorized Personnel ............................................................................................... 4Procedure Notes ..................................................................................................... 4Standard limited engine warranty & warranty conditions ................................................... 5Time Limits .............................................................................................................6General note ......................................................................................................... 6Time limits for engine operation ................................................................................. 6Time limits for rubber parts ...................................................................................... 6Annual inspection ................................................................................................... 7Scheduled maintenance checks ...................................................................................8General note ......................................................................................................... 8Maintenance schedule procedures ............................................................................... 8Inspection Sheet / Maintenance Schedule ...................................................................... 9Identification......................................................................................................9Maintenance Schedule ......................................................................................... 10Engine back to operation ..................................................................................... 12Maintenance tasks .................................................................................................. 13General Note ....................................................................................................... 13Rocker Tappet Clearance ........................................................................................ 13Cleaning air filter ................................................................................................. 13Cylinder head bolts torque ...................................................................................... 14Removal/change of spark plugs ................................................................................ 14Idle speed adjustment ........................................................................................... 14Compression test .................................................................................................. 17