Does it matter which way the impeller goes in?
Impellers must turn in a direction so that the fluid is pushed (not scooped) through the pump (see sample drawing below). Exceptions are pumps with straight vane impellers (vanes perpendicular to the shaft) and shrouded impellers. Straight vane impellers function in either direction.
Which way do you install an impeller?
The blades are “straight” out and will acquire a curve over time and use. Only when re-installing a “used” impeller is rotation direction important. Usually impellers go clockwise, but Al is right, they should bend to the right direction…
How do you determine the rotation of a pump?
Rotation is indicated on the head of the pump, you’ll see an arrow going counter-clockwise. This is the direction you want the pump spinning. If you turn the motor around and look at the backside and remove the cap, you’ll see a shaft located in the center.
What will happen if pump rotation direction is reversed?
If rotation is backwards, the impeller and acorn nut can spin off in just a few seconds, causing damage to the pump’s components such as the bearings or seals. This could completely destroy your centrifugal pump if undetected.
Which way does the water pump impeller spin?
Rotation is indicated on the head of the pump, you’ll see an arrow going counter-clockwise. This is the direction you want the pump spinning.
How often should you change the impeller on a outboard motor?
every three years
In most cases, you won’t need to replace the water pump unless the housing is damaged. Instead, replacing the water pump impeller every three years or sooner should avoid most water-pump-related issues and keep your outboard running in excellent condition.
Which way does a pump impeller spin?
What happens if pump rotates in opposite direction?
A common myth is that in reverse rotation, the pump causes backward flow, that is, IN the discharge and OUT the suction. In reality, a pump operating in reverse rotation because of wiring or phase change will pump in the normal direction. Now, it won’t pump very well. Its flow will be reduced, as will its head.
How do I know if my water pump is reverse rotation?
Water pump pulleys running on the INSIDE surface of the belt indicate a STANDARD ROTATION water pump. Water pump pulleys running on the OUTSIDE surface of the belt indicate a REVERSE ROTATION water pump.