Lycoming A1A exhaust emmissions

Lycoming A1A exhaust emmissions

What would be the likely reason for causing blackish exhaust emmissions from Lycoming 0-360-A1A -180 equipped on a Cessna Skyhawk 172M, could it be the carb air filter needs more regular cleaning or changing making the engine run richer? I mostly operate around the 1,500'MSL level with temps above standard with
high humidity.

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Re: Lycoming A1A exhaust emmissions

You might consider leaning your engine a bit more.
Glenn

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Re: Lycoming A1A exhaust emmissions

Well with standard OAT it makes sense to lean even on the ground, yes I been operating slightly too rich at low level lately, thanks for your feedback.

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