Your 1991 should give you years of trouble free service, I'm not sure you need to change any parts. Some people don't like the plastic parts like the trigger and change them but I don't believe they need to be changed from any reliablity stand point.
1 - 3 of 3 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.