See below for a simple troubleshooting test:
- http://www.4crawler.com/4x4/CheapTricks/Starter.shtml#EasyTest

And see if you can get your old starter back and fix it, you'll be better off in the long run:
- http://www.4crawler.com/4x4/CheapTricks/Starter.shtml#RepairVsReplace