What causes a snowblower motor to surge?

If the snowblower engine RPMs are surging up and down, check the following parts for damage: springs, gasket, carburetor, and spark plug. There are springs on the carburetor that allow the butterfly valves to open and close properly. The springs also ensure the governor is operating properly.

Why does my snowblower engine backfire?

Because of the carbon build-up or a weekend electrode, the spark plug decimate overtime. This results in an improper ignition or no ignition at all. The engine responds accordingly and the snowblower backfires.

What are the problems with a Tecumseh snow blower?

Tecumseh engines are built for use in lawnmowers and snow blowers. Common problems that affect the governor on a Tecumseh engine are that the engine runs either too fast or too slow or that the engine surges or hunts.

What should I do if my Tecumseh engine is not working?

Some repairs should be left to professionals, but diagnosing the problem with the governor is an easy process for most do-it-yourselfers. The governor shaft on a Tecumseh engine should face the same direction as the governor arm to open the throttle. Adjust the governor by loosening the screw on the bottom of the governor arm.

What causes lawn mower engine to surge at end of season?

1) Bad Fuel The number one cause of mower engine surge is using gasoline that is old or contaminated – perhaps by water condensation, usually as a result of leaving gas in the mower over the winter. Many homeowners forget or choose not to drain the gas from their mower’s tank at the end of each season.

Is there a carb Adjustment on a Tecumseh?

There is no carb adjustment. I changed the plug, put in fresh 93 octane gas, checked fuel flow, checked for a sheared flywheel key, and adjusted the coil gap. Still have the surging and backfiring. Some thoughts… I hear Tecumseh has several flywheel keys, some are offset.