The first snowfall of the season can be a beautiful sight, but for homeowners, it often signals the looming task of clearing driveways and walkways. If your trusty snowblower has been gathering dust in the garage for a year or more, the thought of getting it running again might seem daunting. However, with a systematic approach and a bit of patience, you can often bring your old snowblower back to life and be prepared for whatever winter throws your way.
This guide will walk you through the essential steps to diagnose and resolve common issues that prevent older snowblowers from starting. We'll cover everything from basic maintenance to more involved troubleshooting, empowering you with the knowledge to tackle this common winter chore yourself. By the end of this article, you'll be equipped to confidently assess your snowblower's condition and take the necessary actions to get it roaring back to life, saving you time, money, and the back-breaking effort of manual snow removal.
Assessing the Basics: Safety First and Initial Checks
Before you even think about pulling the starter cord, prioritizing safety is paramount. Ensure the snowblower is in a well-ventilated area, away from any ignition sources. Disconnect the spark plug wire to prevent accidental starting while you're working on the engine. Visually inspect the entire machine for any obvious damage, loose parts, or leaks. Check the fuel lines for cracks or brittleness, and ensure all controls, such as the throttle and choke, move freely.
Next, turn your attention to the fuel. Old gasoline can degrade over time, forming varnish and gum that clog fuel lines and the carburetor. If the fuel in the tank is more than a few months old, it's best to drain it completely and refill with fresh, high-quality gasoline. While draining, also inspect the fuel cap for any blockages. A clogged fuel cap can prevent air from entering the tank, creating a vacuum that stops fuel flow.
Finally, check the oil level. Most snowblowers have a dipstick for this purpose. Ensure the oil is within the recommended range on the dipstick. If the oil appears dark, sludgy, or has a milky appearance, it's a sign that it needs to be changed. Running an engine with old or contaminated oil can lead to significant internal damage, so this is a crucial step in preparing your snowblower for operation.
The Heart of the Matter: Fuel System Troubleshooting
The fuel system is often the culprit when an old snowblower refuses to start. The carburetor, in particular, is susceptible to clogging from stale fuel. If you've replaced the fuel and checked the basics, the next step is to address the carburetor. For a simple fix, you might try using a fuel system cleaner additive in the fresh gasoline. These additives can help dissolve minor varnish deposits.
If a cleaner doesn't do the trick, you may need to clean the carburetor more thoroughly. This typically involves removing the carburetor bowl to drain any residual fuel and debris. You can then use carburetor cleaner spray to spray into the jets and passages. For more stubborn clogs, you might need to remove the carburetor entirely and disassemble it for a deep clean. Refer to your snowblower's owner's manual for specific instructions on carburetor removal and cleaning for your model.
Beyond the carburetor, inspect the fuel filter if your snowblower is equipped with one. A clogged fuel filter will restrict fuel flow to the engine. These are usually inexpensive and easy to replace. Also, check the fuel lines for any kinks or blockages. Sometimes, a simple visual inspection and a gentle squeeze can reveal a problem, or you may need to disconnect them to ensure a clear path for fuel.
Ignition and Air: Ensuring a Spark and Breath
An engine needs a spark and air to combust fuel. If your snowblower is getting fuel but not starting, the ignition system might be the issue. The spark plug is the most common component to inspect. Remove the spark plug and examine its condition. If it's fouled with oil, carbon, or appears worn, it needs to be replaced. Ensure the gap on the new spark plug is set according to your owner's manual specifications.
To test if the spark plug is firing, reconnect the spark plug wire to the plug, but keep the plug itself grounded against a metal part of the engine block (use insulated pliers for safety). Have someone pull the starter cord while you observe for a spark. A strong, blue spark indicates the ignition system is likely working. If there's no spark or a weak yellow spark, you might have a problem with the ignition coil, flywheel magnets, or the spark plug wire itself.
The engine also needs air to run. Check the air filter. A dirty or clogged air filter will restrict airflow, making it difficult for the engine to start and run efficiently. Most air filters are easily accessible and can be cleaned or replaced. If you have a foam filter, wash it with soap and water, let it dry completely, and then lightly oil it before reinstallation. For paper filters, replacement is usually the best option if it's heavily soiled.
Mechanical Checks and Common Wear Items
Beyond the fuel and ignition systems, several mechanical components can affect starting. The starter rope mechanism, for instance, can become worn or jammed. If the rope doesn't retract properly or feels stiff, it might need lubrication or replacement. The recoil starter assembly itself can also develop issues.
Inspect the engine's cooling fins. Overheating can cause starting problems, and clogged fins prevent proper heat dissipation. Gently clean any debris, such as grass clippings or leaves, from the fins using a brush or compressed air. Also, check the drive belts for any signs of cracking or excessive wear. While not directly related to starting, a damaged belt will prevent the snowblower from moving snow once it is running.
Consider the shear pins. These are designed to break if the auger or impeller encounters a solid object, protecting the gearbox. While they don't typically prevent starting, a broken shear pin can cause unusual noises or prevent the auger from turning once the engine is running, which is a critical part of its function. Ensure they are intact and properly installed.
Advanced Troubleshooting and When to Seek Professional Help
If you've gone through the previous steps and your snowblower still won't start, it's time to consider more advanced troubleshooting. This might involve checking the compression of the engine. Low compression can be caused by worn piston rings, valves, or a blown head gasket, all of which require more significant engine repair. You can purchase a compression tester at most auto parts stores.
Another area to investigate is the governor system, which regulates engine speed. If the governor is sticking or misadjusted, it can affect starting and running. This is a more complex system, and adjustments should be made with caution, following your owner's manual precisely.
If you're uncomfortable with any of these more involved steps, or if you suspect a major internal engine problem, it's wise to seek professional assistance. A qualified small engine mechanic has the specialized tools and expertise to diagnose and repair complex issues. Don't hesitate to consult them if you've exhausted your DIY efforts.
Key Takeaways
- ✓ Always prioritize safety by disconnecting the spark plug before working on the snowblower.
- ✓ Old gasoline is a common cause of starting problems; drain and refill with fresh fuel.
- ✓ A clogged carburetor is a frequent issue; cleaning or replacing it is often necessary.
- ✓ Ensure the spark plug is in good condition and firing correctly; check the air filter for obstructions.
- ✓ If basic troubleshooting fails, consider mechanical issues or seek professional help.
Frequently Asked Questions
How often should I change the oil in my snowblower?
It's generally recommended to change the oil at least once a year, typically at the end of the snow season or before storing it for the summer. However, consult your owner's manual for the specific recommendations for your model, as usage and operating conditions can influence the frequency.
What type of gasoline should I use in my snowblower?
Use fresh, unleaded gasoline with an octane rating of 87 or higher. Avoid using E15 or E85 ethanol blends, as they can damage fuel system components. If your snowblower will be stored for an extended period, consider using a fuel stabilizer to prevent fuel degradation.
My snowblower starts but then dies quickly. What could be the problem?
This is often indicative of a fuel delivery issue or an air restriction. Ensure the fuel tank is full of fresh gas, the fuel cap is venting properly, and the fuel filter is clean. Also, check the air filter for clogs. If these are all clear, the carburetor might be partially clogged or the engine may be running too lean.
How do I know if my spark plug needs replacing?
Visually inspect the spark plug. If the electrode is worn down, the porcelain insulator is cracked, or there is significant carbon or oil fouling, it's time for a replacement. You can also test for spark as described in Section 3. A new spark plug is an inexpensive part that can make a big difference.
Can I use starting fluid to get my old snowblower to start?
Starting fluid (ether) can be used sparingly as a diagnostic tool or for a stubborn engine, but it should not be used as a regular starting method. It contains highly volatile chemicals that can be dangerous if used improperly and can potentially damage engine components if used excessively. If your engine requires starting fluid to run, there is an underlying problem that needs to be addressed.
Conclusion
Reviving an old snowblower is a rewarding process that can save you money and ensure you're prepared for winter's challenges. By systematically addressing potential issues with the fuel system, ignition, and air intake, you can often get your machine back in working order. Remember to always prioritize safety, consult your owner's manual, and don't hesitate to seek professional help if you encounter complex problems.
With a little effort and the guidance provided in this article, your old snowblower can transform from a dusty relic into a reliable winter workhorse. Take the time to perform these checks and maintenance tasks, and you'll be well-equipped to tackle snow removal with confidence when the first flakes begin to fall.
