A snowblower running poorly is a common problem usually caused by a clogged carburetor. Fuel left in the engine for long periods of time can become thick and sticky. The fuel can clog the carburetor and hinder how well it runs. To fix the problem, drain the old fuel and use carburetor cleaner to clean the carburetor. The carburetor needs to be replaced if this does not work.
Next, a faulty spark plug can cause the snowblower not to start. Use a spark plug tester to test the spark plug for continuity, and replace the plug if continuity is faulty. Also check the spark plug electrodes for a visible spark when the engine is cranking. If there are no sparks, the spark plug is faulty and needs to be replaced.
A worn-out drive disk can cause the snowblower wheels not to turn. The drive disk is responsible for protecting the gear case from damage and from being overpowered by the engine. The drive disk can wear out over time or become wet and greasy. Begin by thoroughly cleaning the drive disk with brake cleaner. The disk needs to be replaced if cleaning it does not work.Learn more about Tools