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Mystery solved.
I got to thinking about it, and I compared a 606 injector with a 617 prechamber. The 606 injector would not screw in because of the thread pitch, but would have if the thread pitch were the same. That told me that my extractor tip must have a problem. Upon close examination, I found the threads on the end a little buggered up. A small file on the threads, and it screwed into the 606 prechamber (the first one gave a little fight, but the next five went in like butter). I couldn't imagine why they would design only one model with a different size, and then not make the tool available. It might be good to let Pelican know that the tool does in fact work on a 606, even though it is not listed. So yes, a 606 uses the coarser of the two thread choices of the end of the extractor tip.....Rich
EDIT: Text from Pelican- Extractor Tip (Double Ended) for prechamber in cylinder head, Applicable - Mercedes engine - OM601, OM602, OM603, OM604, OM615, OM616, OM617. $48.23
TOL-M0046-SIR
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