Small Engines (Lawn Mowers, etc.): lawn mower blade not engaging, lawn mower blade, electric clutch

Question
have new bat and new toggle switch and get nothing

Answer
Do you have an electric clutch?  Did you check the clutch and belt?  
If you have a Warner clutch you can use the link below for information on how to check the clutch:

http://www.altraliterature.com/brands.asp?brandID=2&litType=manual

Look under "Turf and Garden"

Eric