Carb Temperature Gauge

[geneticistx]

Hi,
On the plane I fly there is a carb temperature gauge that has an O-350 lycoming engine.

There is a yellow zone, but no red zone on the gauge.

How should this gauge be used to determine the potential (or actual) of developing carb ice?

[CaptDukeNukem]

Hi,
On the plane I fly there is a carb temperature gauge that has an O-350 lycoming engine.

There is a yellow zone, but no red zone on the gauge.

How should this gauge be used to determine the potential (or actual) of developing carb ice?

The yellow range is where carb icing conditions are going to be highest. If flying in these conditions, best to open up the heat at least periodically to check for carb ice.

If you open the heat on, and A large drop in rpm followed by a steady increase back up means you had a large amount of ice.

[Me262]

Apply carb heat to always keep the needle outside of the yellow arc. I'd still apply full carb heat periodically if flying in any kind of potential icing conditions (moisture), as ice can happen even at 30C OAT.

[PilotDAR]

Apply carb heat to always keep the needle outside of the yellow arc.

This.

And, after applying carb heat, re lean the engine. This may change the effect of the carb heat a little too, which is a good thing.

[lastchance]

The beaver manual states card air temp maintained at 40-45f at all times (4-7c)