Total loss of power
in 912 / 914 Technical Questions
11 years ago
Hi all,
I have a problem with my Rotax 912 UL. About 16 years old and maybe 600 hrs.
It started during flight at full power. Total loss of power. Throttle back to idle and the engine kept running. Slowly reapplied power and the engine ran just fine...
Until the next start. Loss of power after about 40-50 seconds. Throttle back and returned to the field. Could apply two shots of power and reached the field. Fixed the plane on the ground and applied full throttle. Seemed to be OK.
Next start same story. Loss of power after about 40-50 seconds. Throttle back and returned to the field.
So I started checking all I could think of.
Ignition circuit one and two (normal drop of rpm)
Fuel outlet in the tank. (Found some debris, not the cause)
Fuel cock. (Found some debris, not the cause)
Electric fuel pump and gascolator (made a bypass, not the cause)
Mechanical fuel pump (got a new one, not the cause)
Replaced all hoses
checked the carbs (no debris)
checked electronic modules according to TB 912-06
checked ground connection according to TB 912-02
checked the spark plugs (looked fine)
checkt the force to rotate the engine without sparkplugs.
(looked fine, less than 50nm)
checked the muffler (no noise when shaking, all openings open)
checked a bottle of whiskey (no more ideas)
I would appreciate it if anyone had any ideas
Thank you for reading!
I have a problem with my Rotax 912 UL. About 16 years old and maybe 600 hrs.
It started during flight at full power. Total loss of power. Throttle back to idle and the engine kept running. Slowly reapplied power and the engine ran just fine...
Until the next start. Loss of power after about 40-50 seconds. Throttle back and returned to the field. Could apply two shots of power and reached the field. Fixed the plane on the ground and applied full throttle. Seemed to be OK.
Next start same story. Loss of power after about 40-50 seconds. Throttle back and returned to the field.
So I started checking all I could think of.
Ignition circuit one and two (normal drop of rpm)
Fuel outlet in the tank. (Found some debris, not the cause)
Fuel cock. (Found some debris, not the cause)
Electric fuel pump and gascolator (made a bypass, not the cause)
Mechanical fuel pump (got a new one, not the cause)
Replaced all hoses
checked the carbs (no debris)
checked electronic modules according to TB 912-06
checked ground connection according to TB 912-02
checked the spark plugs (looked fine)
checkt the force to rotate the engine without sparkplugs.
(looked fine, less than 50nm)
checked the muffler (no noise when shaking, all openings open)
checked a bottle of whiskey (no more ideas)
I would appreciate it if anyone had any ideas
Thank you for reading!
