If you have a gravel driveway then you should have a gap between the blower lower scrape blade. The reason would be to try and eliminate scraping up gravel. Gravel getting stuck in the auger or blower will bust a shear pin. Most snowblowers have adjustable shoes to set the blade height. When I had a 3 pt. blower I had the shoes set for the highest setting and still picked up gravel and sheared a lot of pins.
If you are blowing a paved driveway then the blade should be as close as possible to the driveway
If you are on pavement, make sure your shoes are the same level as the scrapper blade or lower. If the feet are higher than the blade, you may come to a sudden stop when you come to a construction joint or crack.
If you are on pavement, make sure your shoes are the same level as the scrapper blade or lower. If the feet are higher than the blade, you may come to a sudden stop when you come to a construction joint or crack.
This is my take also for pavement. My Lucknow blower did not come with skid shoes or a cutting edge, and it gouged the pavement when I was checking it out. I put some oversized skid shoes on it keeping the blower 1/2" off the pavement and it gets most of the snow off. Worked awesome for the northeast blizzard recently, but I had to go back and use a blade to get down to the pavement. I have a 1/2" thick weld on cutting edge on order, which should be about perfect.