While using Bill's suggestion, BE SURE you check the area under your prop and within a yard of the low point so there are NO bits of gravel, loose asphalt or ANYTHING that can be picked up by the suction.
I was once amazed how well a full power runup pulled gravel up through the layer of grass to ding my prop in multiple places. (This is also a good idea for any engine start, by the way.) Ed
