Symptoms
- Engine fires up for a second or two then stalls
- Repeated pulls give the same brief start and die pattern
- Primer bulb feels empty or doesn't fill with fuel
- Fuel is visible in the tank but not reaching the carburetor
Likely causes
- CommonClogged fuel filterA blocked filter lets just enough fuel through to start briefly before starving the engine.
- CommonEmpty or cracked primer bulbA bulb that won't hold fuel can't properly prime the carburetor.
- PossibleStuck carburetor float or needle valveA stuck float prevents proper fuel flow into the carburetor bowl.
- PossibleClogged fuel tank ventThis creates a vacuum that stops fuel flow shortly after starting.
What to do
- Check the primer bulb fills with fuel when pressed; if it stays empty or cracked, fuel isn't reaching it properly.
- Inspect the fuel filter (often a small screen inside the tank or an inline filter) for clogging and clean or replace it.
- Check the fuel line for kinks or blockages between the tank and carburetor.
- Loosen the fuel cap slightly and try starting again to rule out a vent blockage.
- If accessible, check the carburetor bowl for a stuck float or debris.
- Try fresh fuel if the current supply is old.
- If the engine still dies quickly after these checks, the carburetor likely needs professional cleaning.
Tools and parts
- Fuel filter (replacement)
- Basic wrench set
Small engine fuel filterSearch: “small engine inline fuel filter”
Primer bulbSearch: “small engine primer bulb replacement”
When to call a pro
A small-engine shop can clean the carburetor and check for internal blockages if fuel filter and primer checks don't solve it.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.