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Two clicks on the main rack is a pretty minimal change. There are twelve clicks per full turn of the adjustment screw. Try at least half a turn, six clicks out. Too rich won't hurt these things, it will just suck fuel and be down on power. I would much rather err on the side of too rich than too lean.
Edit - about those spark plugs. "Reading" spark plugs on an MFI inducted motor is far different than on others. Every one that I have ever seen that is tuned properly will have sooty black spark plugs. Trying to achieve those nice light sand beige plugs will see these things running dangerously lean. Oh, and run something with a nice, big, fat electrode (I like the NGK BP 6 and 7). The fancy multi electrode plug die a quick death in this environment.
Last edited by Jeff Higgins; 06-23-2025 at 09:12 AM..
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