I swapped out my mercarb last year to the Holley 300 cfm 2300 marine carb. Has anyone tried using a wideband o2 sensor to tune their carb. So far my carb is extremely rich from idle to wide open. My idle was 10.0 and my midrange was 11.5 to 12.4 and wide open was back to 11.5. My boat ran...