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« Last post by daveson on May 11, 2024, 09:31:48 PM »
I think you're saying that it runs ok, but then when the engine gets warm it goes lean, I guess that might mean about ten minutes after start up. Even if I've interpreted this right, my guess is still unlikely, but it's such a quick and simple thing to check.
This reminds me of a problem I've seen on cars in the past. Start it up and wait for it to go lean, then pop the fuel tank cap open. If the problem then disappears, one possibility is that the fuel filter is lousy, but you replaced that, goodo. Another possibility is that the fuel tank vent is blocked.