When winter storms hit and you’re faced with a snow-covered driveway, a malfunctioning snow blower is a major problem. Instead of resorting to backbreaking shoveling, here’s a step-by-step guide to diagnose and fix common starting issues. These tips can save you time, repair costs, and physical strain.
1. Fuel System Check: Old Gas is a Common Culprit
The issue: Stale gasoline is one of the most frequent reasons a snow blower fails to start. Fuel degrades over time, forming varnish deposits that clog the carburetor. If you didn’t use a fuel stabilizer before storage, the gas may have lost its volatility.
The fix: Drain the fuel system via the carburetor. Refill with fresh fuel and a fuel stabilizer. If old fuel has contaminated the carburetor, professional cleaning or replacement may be necessary. Fuel lines and filters can also become gummed up, requiring shop attention.
Why it matters: Fuel quality directly affects combustion. Neglecting this step means the engine won’t receive the necessary energy to ignite.
2. Verify the Fuel Shutoff Valve
The problem: A simple oversight—the fuel shutoff valve in the OFF position—can prevent starting. It’s easy to forget after months of inactivity.
The solution: Ensure the valve is set to ON. It’s a quick check that eliminates a common mistake.
3. Safety Switches: Key and Toggle
The issue: Many snow blowers have safety mechanisms like a key switch and a red toggle. Failing to engage these prevents ignition.
The fix: Insert the key fully and flip the toggle to the RUN position. Ignoring this will not only prevent starting but can also flood the engine if you repeatedly attempt ignition.
4. Choke Operation: Cold Starts Need Full Choke
The rule: For cold engines, use FULL CHOKE mode initially. This enriches the fuel mixture for easier ignition.
The exception: If temperatures are above freezing, avoid priming the carburetor, as over-fueling can cause flooding. Use choke only in this case.
5. Throttle Position: Give It Some Gas
The setup: Ensure the throttle is set to at least 3/4 speed. Insufficient throttle can starve the engine of the necessary air-fuel mixture.
6. Spark Plug Inspection: The Ignition Source
The checks: Examine the spark plug for three key issues:
– Wetness: Fuel indicates flooding. Turn the engine over repeatedly (with the spark plug removed) to expel excess fuel. Clean or replace the plug.
– Gap: Verify the correct gap and adjust if needed.
– Cracks: A cracked porcelain means the plug is unusable and must be replaced.
The extra step: If the plug checks out, test the ignition coil. A faulty coil prevents spark.
7. Starter Issues: Electric Starts Can Fail
The problem: Electric-start engines can experience starter failure over time.
The fix: If all other steps fail, the starter may need professional replacement.
When troubleshooting, remember that preventative maintenance—fresh fuel with stabilizer, proper storage, and occasional checks—is far easier than emergency repairs. If you’re uncomfortable with these procedures, consult a qualified mechanic.
