Need help re-setting Alfa Spider speedometer "zero"

["mickey thecat" <mickthecat1@xxxxxxxxxxx>]

I had the clutch Master Cylinder replaced by a mechanic.  He must have 
whacked the speedometer sender unit located adjacent, since immediately 
afterword the speedometer at rest reads 15 mph.  The speedometer and 
odometer work just fine except for speeds less than 15 mph (then it reads 
15mph).  I also tried to disconnect the speedometer electrical connector, 
but that did not reset anything.  International Auto told me that replacing 
the speedometer sender unit will probably NOT fix the problem but that there 
likely is some way to adjust the "zero".  Any ideas?  I just listed the car 
for sale on ebay - ending Tuesday 5/20/03, so if anyone has some suggestions 
I want to let the new buyer know what to expect.  Thanks.

Scott
1990 Spider Quadrifoglio
mickthecat1@domain.elided

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