I had the starter go out on both of my 318's at the same time. I went the rebuild route as there is a quality rebuilder about 25 miles from my house. On both starters, there was dirt that somehow got packed inside. On both starters the solenoids were replaced, the commentators turned down in a lathe, new brushes installed and new bushings installed on them. One rebuild cost $53 while the other one cost $83. I don't know why one cost $30 more than the other, but both work like new. You can buy starters off ebay for about $70, but they are Chinese made and don't have a good reputation for longevity. With all the work to remove them, I chose the rebuild route rather than the used OEM or new Chinese made one. If you go the used route, look for "Onan" or "Mitshibushi" labels on them as that will be an OEM starter.