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Why is my 9 HP snow blower engin surging ?

My 9 HP 2 stage sno-blower starts right up but continues to surge non stop even if the engine is hot. I presume it is cause by the governor, but why. kI have clean gas and it worked great when I put it away last year. When the surging wouldn't stop I drained the tank and carburetor bowl and then added gas premixed with Heet but it still surges. What causes this? Bruce in Rochester , NY

Electric Snowblowers , Snow Removal Equipment
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Manage My Life
This is the time of year you need the snow thrower to work. Your troubleshooting sounds like it is on the right track. A suggestion I have to help the expert provide a better answer is to add the model number of the snow blower to this thread. You can also add it to the manuals link below to get online access to the owner's manual. If you decide you would prefer to have an experienced technician diagnose and make repairs, an option is to visit Sears Home Services and use the handy scheduler. I attached the links below. Hope you can move that snow soon.
by Manage My Life
December 11th, 2010
Answered in 15 minutes
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