Jordan1976
Well Known Member
Background: Superior IO-360. 1500 TTSN. Cyl 3 replaced 25 hours ago. Standard slick mags, R&R'd for SB about 10 hours before flight.
Flew outbound for lunch. All EGT's normal, balanced within 20 degrees. Landed, had lunch. Normal run up.Took off, and on climb out, EGT 3 is immediatley 150 degrees higher. When I lean out, all EGTs go into red. CHT's normal or even slightly low. Do some troubleshooting- will barley run on right mag. Continue 15 minutes back to home airport. Find that right mag has slipped timing and is at TDC instead of 25 BTDC.
The problem:
Re-timed both mags to 25 BTDC
Checked all plugs- fine. Rotated plugs.
Compression check - All cyls fine. Cylinder 3 is 79/80.
Cleaned fuel injectors
Ran engine up- EGT's equal until about 100HP / 1250?F. Cyl 3 then quickly goes to 150?F higher
Leaned engine out- all EGT's peak at same time. Assume AFR's are the same
What could lead to EGT 3 being higher only at higher powers? As far as I can tell, the AFR is right, and the compression is fine.
Flew outbound for lunch. All EGT's normal, balanced within 20 degrees. Landed, had lunch. Normal run up.Took off, and on climb out, EGT 3 is immediatley 150 degrees higher. When I lean out, all EGTs go into red. CHT's normal or even slightly low. Do some troubleshooting- will barley run on right mag. Continue 15 minutes back to home airport. Find that right mag has slipped timing and is at TDC instead of 25 BTDC.
The problem:
Re-timed both mags to 25 BTDC
Checked all plugs- fine. Rotated plugs.
Compression check - All cyls fine. Cylinder 3 is 79/80.
Cleaned fuel injectors
Ran engine up- EGT's equal until about 100HP / 1250?F. Cyl 3 then quickly goes to 150?F higher
Leaned engine out- all EGT's peak at same time. Assume AFR's are the same
What could lead to EGT 3 being higher only at higher powers? As far as I can tell, the AFR is right, and the compression is fine.