Another possibility:
The pump has some sort of internal check ball to prevent the oil from draining out of the suction tube and back to the tank. If that valve is leaking, the oil suction tube gets some air in it. The first 8 seconds of running is off the residual oil in the pump. 3 seconds of pulling fresh oil from the tank and then away you go.
I've had this before and replacing the pump was the cure.
Eric
__________________
"Everybody has a plan until they get punched in the mouth" noted philosopher Mike Tyson
Life begins at the end of your comfort zone.
“The mind, once stretched by a new idea, never returns to its original dimensions.”
|