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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

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Electric Snowblowers , Snow Removal Equipment
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2 Answers from these members:
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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Mark T
Thank you for your question.

I am sorry you are having a problem with your snow blower. Usually when an engine surges it is because of the air fuel mixture is off a little. I recommend running the engine, when it is surging turn the choke on slowly. If the engine smoothes out the problem is either an air leak at one of the gaskets or partly plugged passages in the carburetor. Most likely, the main jet plugged. Remove the float bowl of the carburetor and clean the holes in the main jet of the carburetor. This usually will cure the surging issues on most engines. I hope this is helpful.

If you need further assistance, please reply below with a complete model number and more details of the problem.

Thank you for using Manage my life.

Mark T.
by Mark T Earned 10,409 community points in Snow Removal Equipment
December 13th, 2010
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