Jesse
Well Known Member
I just got an RV-6A flying again after the engine hasn't run for about 1.5-2 years. The engine itself was replaced with a low-time O-320-E2A. The carb was the original carb with high time, although running well when last run.
On the first flight, CHT's on 3 & 4 went up quickly and higher than I wanted to leave them. The EGT's were in the 1400's with mixture full rich at sea level.
I am obviously wondering if I have a carb that's not delivering the right amount of fuel to the cylinders, causing the high CHT's. I am sure improvements can be made to the baffles, but a lean cylinder at high power will make the CHT's run high. I would like to get the mixture running right before I go much further, to see how the cylinders run with the right amount of fuel.
Next question is what the difference is between one MA-4SPA carb and another. There are a number of different part numbers. Is there a chart somewhere that tells the difference?
Thanks.
On the first flight, CHT's on 3 & 4 went up quickly and higher than I wanted to leave them. The EGT's were in the 1400's with mixture full rich at sea level.
I am obviously wondering if I have a carb that's not delivering the right amount of fuel to the cylinders, causing the high CHT's. I am sure improvements can be made to the baffles, but a lean cylinder at high power will make the CHT's run high. I would like to get the mixture running right before I go much further, to see how the cylinders run with the right amount of fuel.
Next question is what the difference is between one MA-4SPA carb and another. There are a number of different part numbers. Is there a chart somewhere that tells the difference?
Thanks.