If it's pulsing the revs - jumping up a little over idle like you're just touching the throttle - that could be a bad injector not spraying properly and giving you uneven running. Sometimes the revs can jump as high as 1500+rpm, and it's worst when very cold or very hot. Another symptom if it's that would be trouble starting it in the cold, no matter how many times you run the glow plugs.
It was not strictly a differential gear, it was a reduction gear to reduce the relatively high engine revs by a fixed amount so that at full throttle at maximum speed in fine pitch the propeller tips would not go supersonic and break up through unstable shock wave generation. All high power propeller aero-engines had one, both piston types and turbo-props, especially turbo-props of which the turbine speed was very very much higher than the permissible propeller speed. Variable pitch controlled the speed of the propeller by varying the angle at which the blades met the airflow, the reduction gear was a fixed ratio which in turn governed the engine revs. Fine pitch = high revs, Coarse pitch = low revs. Engines like Hercules,Centaurus, Proteus (turbo-prop), Merlin, Griffon, etc. and their American counterparts all had one.
Chicken livers are a good source of nutrition ~ see related link below . Your best advice will come from your doctor . Low in sodium No sugar Very high in iron Very high in niacin Very high in pantothenic acid Very high in phosphorus Very high in riboflavin Very high in selenium High in thiamin Very high in vitamin A Very high in vitamin B6 Very high in vitamin B12 Very high in vitamin no they are not! my friend threw up and got really sick and almost died practically.
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