What’s Going On: Your iGen4500 won’t turn over or start because one or more essential systems—fuel delivery, ignition, battery power, or engine oil level—is not meeting the engine’s requirements.
A Westinghouse iGen4500 that refuses to start is frustrating, but the good news is that most causes are straightforward to diagnose and fix without a service call. Whether you’re dealing with stale fuel, a dead battery, or a flooded engine, this guide walks you through the most common culprits in order of likelihood and ease of repair.
At-a-Glance: Most Likely Causes
| Cause | Likelihood | Typical Cost to Fix |
|---|---|---|
| Battery switch in OFF position | Very Common | $0 |
| Out of fuel or low fuel level | Very Common | $0 |
| Bad or stale fuel | Common | $10–$30 |
| Low engine oil (shutdown sensor triggered) | Common | $5–$15 |
| Dirty air filter | Common | $10–$20 |
| Spark plug issue (wet, fouled, or gapped) | Common | $5–$15 |
| Battery drained below cranking voltage | Occasional | $50–$150 |
| Fuel filter restricted or fuel pump failure | Occasional | $30–$100 |
Diagnostic Walkthrough: Start Here
Work through these steps in order. Most fixes take 5–15 minutes and require only basic tools.
- Check the battery switch. Locate the battery switch on the control panel (usually labeled “Battery” or “ON/OFF”). Ensure it is set to the ON position. This is the single most common reason an iGen4500 won’t crank. If it was off, flip it on and try starting the engine.
- Verify fuel in the tank. Open the fuel door and visually inspect the fuel level. If the tank is empty or nearly empty, refill with fresh unleaded gasoline (87 octane minimum). If the generator has been sitting for months, the fuel inside may have degraded even if the tank appears full. Proceed to step 3 if fuel is present.
- Drain and replace old fuel. If the generator was stored without fuel stabilizer or the fuel smells stale or varnished, drain the old fuel completely. Locate the fuel drain plug (consult your owner’s manual for exact location), place a container underneath, and open the drain. Once empty, refill with fresh gasoline and a fuel stabilizer additive. Attempt to start.
- Check the engine oil level. The iGen4500 has a low-oil shutdown sensor that prevents starting if the oil level is too low. Locate the oil dipstick or sight glass on the engine block. If the level is below the minimum mark, add the recommended oil type (typically SAE 10W-30) until it reaches the full line. Wipe the dipstick clean between checks. Try starting again.
- Inspect and clean the air filter. A clogged air filter restricts airflow and can prevent starting. Locate the air filter housing (usually a plastic box on top of the engine). Remove the filter element and hold it up to light. If you cannot see light through it, it is dirty. Replace it with a new filter or clean it gently with compressed air if it is only lightly soiled. Reinstall and attempt to start.
- Remove and inspect the spark plug. Unscrew the spark plug wire from the top of the engine and use a spark plug socket to remove the plug. Examine the electrode tip: if it is wet with fuel, the engine is flooded. Dry the plug with a clean cloth, wait 10 minutes, and try starting again without the plug installed to allow excess fuel to clear. If the plug is black and sooty (fouled), replace it. If the gap (distance between the center and side electrodes) appears too wide or too narrow, replace the plug with one gapped to the manufacturer’s specification (typically 0.028–0.032 inches for this model).
- Test the battery voltage. If the engine cranks slowly or makes a clicking sound instead of turning over, the battery may be discharged. Use a multimeter set to DC voltage and touch the probes to the battery terminals. A healthy battery should read 12.6 volts or higher at rest. If it reads below 12 volts, the battery is drained and needs charging or replacement. Connect a battery charger and allow it to charge for 8–12 hours, then try starting.
- Check the fuel filter and fuel lines. If you have completed steps 1–7 and the engine still won’t start, inspect the fuel filter (located in the fuel line between the tank and carburetor). A restricted or clogged filter prevents fuel from reaching the engine. If the filter appears dark or clogged, replace it. Ensure all fuel line connections are tight and free of cracks or leaks.
Parts You May Need
- Spark plug (OEM or equivalent)
- Engine oil (SAE 10W-30 or per manual specification)
- Air filter element
- Fuel filter
- Fresh unleaded gasoline (87 octane)
- Fuel stabilizer additive
- 12V battery (if replacement needed)
- Carburetor rebuild kit (if fuel system cleaning is required)
When to Call a Pro
If you have completed all diagnostic steps above and the engine still refuses to start, or if you observe any of the following warning signs, contact a certified small-engine technician:
- The engine cranks normally but produces no spark (test by removing the spark plug wire and holding it near the plug while cranking; you should see a blue spark jump the gap).
- Fuel is reaching the carburetor but the engine does not respond to starting attempts.
- The battery is fully charged but the starter motor does not engage or cranks very slowly.
- You detect a strong fuel smell inside or around the generator, suggesting a fuel leak or severe carburetor flooding.
- The low-oil sensor light remains on even after adding oil to the full mark.
- You are uncomfortable performing any of these checks yourself.
Frequently Asked Questions
How often should I run my iGen4500 to keep it in starting condition?
Run your generator under load for at least 15–20 minutes once per month. This circulates fresh fuel through the carburetor and prevents fuel degradation. If you store the generator for longer than 30 days, drain the fuel tank and carburetor or add fuel stabilizer to the tank before storage.
What type of fuel should I use in my iGen4500?
Use fresh, unleaded gasoline with an octane rating of 87 or higher. Do not use ethanol-blended fuel (E10 or higher) unless your manual explicitly permits it; ethanol can damage fuel system components and degrade quickly in storage. Always use fuel stabilizer if you plan to store the generator for more than two weeks.
Can I use a trickle charger to maintain the battery during storage?
Yes. A trickle charger or battery maintainer is an excellent way to keep the battery charged during long storage periods. Connect it to the battery terminals and leave it plugged in. This prevents the battery from self-discharging and ensures the generator is ready to start when you need it.
Why does my spark plug keep fouling?
Spark plug fouling (black, sooty buildup) usually indicates the engine is running too rich (too much fuel, not enough air) or the oil level is too high. Check that the air filter is clean, the oil level is at the correct mark (not overfilled), and you are using the correct spark plug type and gap. If fouling persists after these checks, have a technician inspect the carburetor and ignition system.
Disclaimer: This article provides general troubleshooting information for the Westinghouse iGen4500 generator. It is not a substitute for your owner’s manual or professional service. Always consult the manufacturer’s manual for your specific model before performing maintenance or repairs. If you are unsure about any procedure, contact a certified small-engine technician or Westinghouse customer support. Improper maintenance or repair can damage your equipment or create safety hazards.
Source: Information adapted from official manufacturer documentation (reference). Always consult your generator owner’s manual for model-specific procedures.