Leonard, Here are some of the cross references I have in my notes for my Onan MDJE; perhaps they will be of help. Oil Filter Fram PH16 NAPA 3366 Every 200 Hours @ Oil change Fuel Pri. Fram P1115 Baldwin BF938 Every 600 Hours Fuel Sec. Fram P1116 Baldwin BF939 Every 600 Hours Generator Fuel Scondary: mine is a Racor 500G replacement - elements: NAPA filter element: PN 33796, 2 micron. 2 for $12.59 less 10% Source: $6+ each at www.marinefilters.com http://www.wixfilters.com/filterlookup/results.asp?PartNo=33796&Submit=Search Generator Fuel (Primary): Onan factory filter (twin elements) Wix Part Part No. Engine Exceptions Fuel Filter 33110 MDJE (Cartridge) Oil Filter 51084 MDJE First Fuel Filter 33365 MDJE (Spin-on) Second Fuel Filter 33366 MDJE (Spin-on) Generator Oil: Fram PH16, Onan 122-0185. I have often wondered why any mechanical design engineer would find this generator needed TWO different fuel filters/sizes, instead of a single 2 micron, since most owners are going to have a Racor or some equivalent installed in the feed line. Overkill or underthought??? Martin Veiner _____________________________________________________________ Click for free info on online degrees and make up to $150K/ year. http://thirdpartyoffers.juno.com/TGL2111/fc/Ioyw6iigA5BNbeBN3pauMgTeE5qVrrTwC 9ZRLsy73ogAGhnoUZSUc0/