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Power and Propeller

IO-520 cold wx EGT's
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Your call, but consider, if you intend to fly in low temps, density altitude can sometimes be thousands below sea level. Setting fuel flow just to redline might not be enough to keep mixture from being too lean. Setting to 28-29gph will eliminate that problem. My comments are from 33 years of flying Skywagons in Alaska.
 
Its a IO-520 and redline is 25gph and it was just a tad below that. I believe the Cessna FF is fairly accurate as I also have a new JPI FF gauge which is right on with total fuel burn and it reads the same as the Cessna one. I did not look at it during takeoff as its down a bit low and not used to it yet.
I will talk to my IA and have him tweak the FF to the redline.
 
Tom

 
Sounds like you need to adjust your fuel flow higher. It should be in the high twenties, say 28-29gph at full throttle at sea level. You can always lean it out, hard to enrich beyond full rich if it is too lean.
 
Sounds like you need to adjust your fuel flow higher. It should be in the high twenties, say 28-29gph at full throttle at sea level. You can always lean it out, hard to enrich beyond full rich if it is too lean.
 
First cold day with a newly acquired 185.
I noticed right away the EGT's rising higher than normal as I reduced power.
OAT was around 20F and as I reduced the power as I needed to keep the speed down to 22/2300 the egt's rose to around 1475 from low 1400's. Mixture was full rich and was at sea level.
I am guessing it is because the air is much more dense at the colder temps.
Is it normal to have to tweak  the injection system in the colder temps?
The fuel flow at full TO power was slightly shy of the red line. I do have a JPI FF gauge but don't recall the actual ff.
 
Thanks for any thoughts or advice.
 
Tom

 
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