You need to remove the starter to identify what parts you need to order based on what's broken/not working. Without getting in there, you have no idea what the real problem is and what parts are needed to fix it and to order.
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first thing you need is a service manual to make that determination. I had a link to a free pregen service manual before, but it has since been changed to a pay service. Do a search on Google and I'm sure you can come up with source for a free pregen manual online.
