I have an RV-7 with a Hartzell Blended Airfoil C2YR-1BFP and an MT-860-4 Prop Governor. All work normally until I reduce RPM to about 2300 RPM. At that point, further selection of a lower RPM has no effect. The only way to get RPM below 2300 is to reduce MAP. When MAP is reduced, the prop RPM will decrease and the prop acts a though it's a fixed pitch prop -- prop follows MAP.
The cable to the governor works fine. Governor can be controlled from HI to LO stops. Runup prop check is normal -- drops to about 1500 RPM during cycle.
Would greatly appreciate your troubleshooting recommendations...
Thanks
John
The cable to the governor works fine. Governor can be controlled from HI to LO stops. Runup prop check is normal -- drops to about 1500 RPM during cycle.
Would greatly appreciate your troubleshooting recommendations...
Thanks
John