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Hey all, I am working with Tempest to get the set of 12 fine wire plugs for my IO-550-G that I picked up at the Mooney Summit. On the application chart, there are two models listed for this engine: -URHB32S and URHB36S I quizzed the Tempest guy as to the difference and which one to get. He said the difference is how hot they run, and since Conti engines tend to run hotter he suggested the 32S but that I should check with my A/P to be sure. So I've checked with both my A/Ps and neither one of them had a clue that there even was a difference, or which they would recommend. One of them suggested that he'd always want a hotter plug, while the other was noncommittal. So, open to the group...anybody who's put fine wires on the IO-550 or similar, do you remember which version you used or do you have any advice/recommendations? Thanks!
