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Small Engines (Lawn Mowers, etc.)/9hp Craftsman Snowblower-Stuck Governor?


Hi Eric,
I have a 2003 9hp Craftsman Snowblower, I always run Stable Fuel
additive (red version) and a little Thermo-Aid.

I ran the tank empty till the machine shut off, Last spring.
Now in Dec I filled the tank and pressed the primer a couple
times and it started right up.
It is running FULL BORE, and won't throttle down with the
speed lever. (full bore meaning wide, wide, WIDE OPEN!!!

It can be shut off with the speed lever.
It sets outside all season, Can I spray PB-Blaster to free
something up?

Model # 536.887992
Serial # 7472635-131V023

IS your engine model number 143.049001?

I know the engine is a Tecumseh engine but the model number is not crossing to a Tecumseh number.  It really does not matter for you issue is either carb or governor.

Are you sure the carburetor butterfly and butterfly shaft are not sticking or binding?

Check out the links below and see which one if for your engine.  Most likely you will have a Tecumseh HSK (Horizontal Snow King) 4-cycle engine and not a cast iron or 2-cycle engine.

This should be the link:

Check the carb for binding/sticking, make sure the governor spring is in place, and finally, if necessary, try performing a static governor adjust.

There are lots of videos on You Tube on cleaning carbs, adjusting governors and replacing governor spools.


Small Engines (Lawn Mowers, etc.)

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Eric A. Jones


Lawnmower Repair . Certified Master Service Technician from B&S. Have 23 years experience on B&S, Lawn Chief, Weed Eater, Echo, Peerless, Wheel Horse, Snapper, Atlas, MTD, McCulloch, Homelite and many other numerous brands. Specialize in electrical repair.


Born and raised in the midwest. Started tinkering with engines when I was about 14 on my Suzuki RM-80. I began lawn mower repair at a small hardware store. I knew absolutely nothing. I read lots of repair manuals and met an older fellow who taught me many lessons. I continued working on small engines through high school and paid my way through college working on mowers at the same hardware store. Decided to get away from the midwest and mower repair so I joined the Air Force. I repaired air traffic control electronic equipment and ended up in Hawaii where I got a part time job at Small Engine Clinic. I gained a lot of experience from the Small Engine Clinic and had a blast repairing small engines. I then took the Briggs and Stratton Master Service Technician test and earned my MST. I then traveled to Wisconsin where I attended the factory update training seminar and received formal training. Continued working on mowers part time as I completed 20 years of military. Retired from the military on a Friday and continued in the lawn and garden industry the next Monday.

MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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