Propeller Owner's Manual
136
TESTING AND TROUBLESHOOTING
61-00-36
Page 4-9
Rev. 2 Feb/17
C. Engine/Propeller Speed Increases With Increasing Engine
Power And Decreases With Decreasing Engine Power
(1) Excessive friction in propeller blade bearings or pitch
changing mechanism of the propeller
(2) Governor is not pumping oil to the propeller or draining
oil from the governor
(a) Blockage of the oil line from the governor to the
propeller.
(b) Governor pilot valve is sticking.
D. Governor RPM Control of Engine/Propeller Speed Has
Little or No Effect
(1) Excessive friction in propeller blade bearings or pitch
changing mechanism of the propeller
(2) Blockage of the oil line from the governor to the
propeller.
(3) Engine oil transfer system is leaking excessively.
(4) Internal oil leakage to opposite side of hydraulic piston
and the propeller resists the attempt by the governor
to move the piston for pitch change.
