Check to ensure that there is fresh, clean fuel in the fuel tank. Also check the fuel filter, because a clogged fuel filter will prevent the engine from obtaining adequate fuel supply.. Failure to replace your Husqvarna's fuel filter every season may also prevent your mower's engine from starting; a dirty filter prevents the flow of gas to the carburetor. These riding mowers use an in-line fuel filter. To change it, you must access the fuel line and gently clamp the side of the line nearest the fuel tank to prevent gasoline leakage.
Reasons Your Husqvarna Chainsaw Will Not Start Bad Switch or Wrong Setting. The switch on your Husqvarna chainsaw must be placed in the on position to start.. FAQs. FAQs about why Husqvarna lawn mower is not starting: 1. Why is my Husqvarna lawn mower not starting after being stored for the winter? A: If your Husqvarna lawn mower is not starting after being stored for the winter, it is likely due to stale fuel.