I had one that was somewhat damaged. It was slightly bent. I chucked it in a hand drill, secured it to my workbench, and VERY CAREFULLY, used a dressing stone to work it back in straight. Seemed to work fine for me. It was on my Lightwin. It idles down to a crawl. 😉
I also use a drill and hold 320 grit wet dry sand paper in can use oil with it and finish it with 600 gritmy fingers and spin the needle and squeeze the paper to remove the defects.
If you check marinengins.com A lot of those needles are still available new for not a lot of money. I bought one that was damaged for my 59 fastwin a few weeks ago. Like t2stroke said, is the seat mucked up as well?
That’s an easy fix Mr. Asa. Spin it in a lathe or drill press and use a fine whetstone or a piece of wet n dry paper on a flat surface to remove the groove. I finish them with 1500 and a bit of polish so they shine like a mirror! Lately I’ve been using several different grits of diamond stone to dress them.