New Starter Not Turning

[wc701lists at bellsouth.net]

Tim Rogers wrote:
> When I go to start the car, I turn the key to "On" and hear the fuel 
> pump prime.  Turn the key farther to Start and the warning lights on the 
> dash dim (hooked up a volt meter to the battery and the voltage dips 
> from 12.79v to 4.xx when I try to start it so the relays are OK, 

The 4V seems awfully low, but I don't know an appropriate number.  I do 
remember a list member years ago who reported that extreme dirt & 
corrosion between the block, bellhousing, and starter was causing a bad 
ground and failure to start.

-Wayne