I won't lie, I laughed. Could you elaborate on your question? It is too short and needs further scope.
this probably means you have a worn cam shaft or cam shaft or the arm that hits the cam shaft to open the valve is worn. this is internal on the engine.
most likely worn output shaft bushing worn
To accurately measure the length of an arrow shaft, use a measuring tape or ruler to measure from the nock groove at the back of the arrow to the tip of the point at the front. Make sure to measure in a straight line along the shaft for the most precise measurement.
The standard unit used to measure shaft work in mechanical systems is the Joule (J).
It could be as simple as a slight imperfection in one of the gears or it could be an indication that the drive shaft or "half shaft" is worn.
It could be from worn bearings on the shaft that the pulley turns.
you need a tachometer
micrometer
on the blower most bearings are flange mount, and will have a Allen set screw locking the shaft to the bearing,
Worn yoke/tailshaft bushing
leakage will happen and the seal will be worn in a short time after installation.
replace worn steering parts rebuild steering shaft