Sherwood Impeller Performance Data

	A self-priming vacuum is created as the flexible impeller vanes straighten upon leaving the cam, drawing liquid into the pump.
	The rotating impeller carries liquid from the inlet to the outlet port. As a consequence of their design, flexible impeller pumps can pass fairly large solids.
	When the flexible impeller vanes regain contact with the cam, they bend and the liquid is discharged from the pump in a uniform flow. Liquids can be pumped in the opposite direction by reversing the rotation of the pump.

Sherwood Technical Tips
Sherwood recommends replacing your impeller annually. However, as usage may vary vastly, Sherwood does have some storage tips for those who do not have many hours on your engine.
	Storing your impeller in a cool dark place avoids the following problems: Copper Bonding to the impeller as it sits in the housing Vanes "setting" in the position as stored in the housing Ultra Violet (Sunlight) deterioration
Sherwood suggests three easy tips to help you install your new impeller
	Use a non-petroleum based lubricant (i.e. silicon or soapy water) to help slide in the impeller Install the impeller with a twisting motion onto the shaft. Never force the impeller onto the shaft. The impeller must move freely on the shaft. The impeller must move freely on the shaft to properly prime and function Use a small amount of non-petroleum based lubricant to help hold the o-ring when replacing the cover
Sherwood recommends inspecting your impeller closely during any pump maintenance. Replace the impeller if you discover either of the following.
	Tear or rip on any of the impeller blades. Flex the blades to examine more thoroughly. Severe wear on the impeller