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Troubleshooting Snowblowers
Starting Problems
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If you are having problems starting a snowblower, the best course of action is to check the spark plugs, throttle cable, fuel shot off and gas. Some start-up problems are caused by dead plugs. Remove the spark plug, attach a spark plug wire to the pin, turn on the machine and check to see if there is a spark. If so, check to make sure your plugs are firing. If not, replace them with a set of fresh plugs.
Jammed Throttle Cable
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Another possibility on older models is that the throttle cable is jammed and not opening the throttle enough to start the engine. Remove and clean the throttle wire by unscrewing the bolt that holds the wire in place. Disconnect the other end from the throttle lever, and then reassemble it. Also, try to manually engage the throttle while you start the snowblower to see if this is indeed the problem. Other starting issues could be related to low fuel in the tank, blockage in the fuel lines or carburetor issues. The former two can be remedied by refilling with gas and cleaning the fuel lines, respectively. The latter is a little more involved.
Carburetor Issues
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Most carburetor issues in a snowblower come from a leaking carb that is not sending gas to the engine. Check around the carburetors for cracks or gas stains. if you find them, remove the carburetor by unscrewing the two mounting bolts on either side. Inspect the bowl for small hairline cracks with a flash light and magnifying glass. Also, check to make sure the seals and gaskets are not worn out. Replace any parts that are broken or have them professionally re-built. For leaks without any visible cracks you should install a new fuel cut-off system. This is a simple valve that attaches to the fuel line. It has a lever that opens and closes the lines and prevents fuel from dripping out of the tank and flooding the carburetors, which can cause erosion and starting problems.
eHow Article: Troubleshooting Snowblowers
