I replaced the starter on this welder 5 years ago. The replacement always sounded really bad when cranking. I do not use this welder very often and has not been started in a year. When I tried to get it going a couple weeks ago it took a lot of spinning and busted the nose off the starter. The replacement I got is identical to the busted one and the drive does not seem to mesh with the flywheel very good. In my research I have found some starters had a cast iron nose and 10 teeth and the replacements say may not replace that starter. I do not have the original starter to compare. The replacement starter descriptions say 9 and 10 tooth are interchangeable. Does anyone have any experience with this?? The Onan engine is model CCKA-MS/3718J and serial is C800 487848. I have found a replacement with a 10 tooth drive but don't know if it will work. The teeth on the flywheel look good. Thanks for any help.