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Small Engines (Lawn Mowers, etc.)/Snowthrower engine won't shut off


QUESTION: Snow-tek (model 920402, 24E)starts and works fine but does not shut off either by the shut off switch (rocker switch) or by removing the key. I have to close fuel shut-off valve to stop it. What is the problem and how I fix it? The thrower has LCT 208 series GEN II engine.

Also, is there any harm to the engine by stopping it by the way I am doing it, since this the only way for me stop the engine.

Is is something that can be fixed easily? I am a novice. Thanks.

ANSWER: I'm betting the shut-off wire either came loose or broke.  If you remove the engine shroud you will gain access to the igntion module.  Follow the small ignition wire from the ignition module to the engine shut-off switch and see if it is still connected.

You may also just check around the plastic key/pin shut-off area and see if a wire came loose or broke.

There is no harm shutting the gas off to stop the engine.  If fact, this is how I shut-off my mower.

Let me know if you find a loose or broke wire.


---------- FOLLOW-UP ----------

QUESTION: Great Eric, I did indeed find a loose (separated)wire connection around the shut-off switch  area and when I joined the disconnected ends the rocker switch worked sr expected. Thanks for your suggestion. Saved me a service trip to the dealer - you know these things are heavy!


As good practice I would still shut the fuel off when you are not using the machine.  Most of our repairs are carb releated.  A very common tell-tale sign of a carb problem is gasoline in the oil.  Shutting off the fuel prevents gas from entering the engine oil even if the carb is leaking.  You will not notice a leaking carb when running the blower as the engine is consuming gas during use.

You will notice a dirty carb as the machine will probably not run or will run very poor.

Easy method to keep the machine out of the shop is to just shut-off the fuel after each use.

Glad to hear you found the problem.


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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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