If you have made it this far and still can't get it started, it might be more complicated. These can be found in the owner's manual. *Check the replace spark plug. If need repair or replacement, make sure to get it done. You should be able find a replacement sparkplug at your local big box. *Some snowblowers will have a fuel filter at the fuel line. It can get clogged and restrict fuel flow to the point that it won't start. *A dirty engine air filter can cause a snow blower to have a reduced performance. Although we haven't seen an air filter stop a snowblower from starting, it is something that you should check. *Clean the carburetor regularly. If untreated fuel has been left in the snowblower's engine from last season, it is possible that the carburetor must be cleaned. You could have a gummed-up carburetor or rusty due to moisture. Problems with restricted carburetors are the number one problem in small engines, such as snowblowers.