Did you check it for leaks while it was running? I wanted you to do a visual inspection the spray the area with carb clean while running the engine to see if it would show any change in rpm indicating an air leak.you may not see signs of leak by visually inspecting the boot and seals,
I looked through where the book links up to and the needle is actually hanging I just don't know if it hanging like that for idle or not. My guess is no but I'm not an expert
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