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Small engine primer bulb. The primer bulb draws additional fuel into the carburetor to help start the engine.

Primer bulb (or purge bulb) assembly. The primer bulb draws fuel into the carburetor to make the engine easier to start. The short port on the primer bulb is the inlet. The longer port is the outlet back to the fuel tank.

Small engine primer bulb with hose, large diameter. If the engine does not start the primer bulb may be defective and unable to draw additional fuel in to the carburetor to assist with starting the engine.

Purge bulb

Zama primer bulb, red. The primer bulb draws additional fuel into the carburetor to make the engine easier to start. If the primer bulb is leaking, replace it.
The carburetor is the most common reason a Craftsman leaf blower won't start or runs rough. Ethanol fuel damage corrodes the float, needle, and jets inside — a carburetor rebuild kit often fixes the problem without replacing the entire carb. The primer bulb works hand-in-hand with the carburetor; when it cracks or won't draw fuel, the engine can't prime and ignition becomes nearly impossible.
Both parts work together to deliver fuel to your blower's engine. A cracked primer bulb won't build pressure, and a gummed carburetor won't flow fuel even if the primer bulb is perfect. Repair Clinic stocks OEM Craftsman carburetor kits and primer bulbs that fit your exact model — verify your model number to get the right fit.
Find your Craftsman leaf blower carburetor and primer bulb parts — enter your model number above to see the exact parts that fit.
A leaf blower that cranks but won't fire usually has a fuel delivery problem — and the carburetor is the #1 suspect. If the engine has been sitting for more than a season, ethanol in the fuel has likely gummed up the carburetor jets and needle seat. The primer bulb should feel firm when squeezed; if it's cracked, soft, or won't build pressure, fuel can't reach the carburetor. Try a carburetor rebuild kit first — it's much cheaper than replacing the whole carb and fixes most hard-start issues on Craftsman blowers.
A carburetor rebuild kit includes gaskets, seals, needle, float, and jets — the parts that typically fail from ethanol damage and clogging. A rebuild kit costs $15 to $30 and works if the carburetor body itself isn't cracked. A full replacement carburetor (OEM or equivalent) is needed if the body is damaged or a rebuild kit doesn't restore starting. For most Craftsman leaf blower owners, the rebuild kit solves the problem and costs a fraction of a full carb.
A bad primer bulb will feel soft or cracked, or it won't hold pressure when squeezed. Yes, you can replace the primer bulb separately from the carburetor — they're independent parts. However, if both the primer bulb and carburetor are failing, replace them together for the best starting performance. The primer bulb draws fuel into the carb; the carb delivers it to the engine. Both must work in sync.
Ethanol fuel (standard in most US gasoline) absorbs moisture and corrodes carburetor internals over time, especially during off-season storage. To prevent carburetor gumming: run the blower until the tank is empty at season's end, use fuel stabilizer in stored fuel, or drain the fuel and carburetor before winter. A fresh OEM Craftsman primer bulb and carburetor kit ensure reliable starting year after year — and entering your model number into our lookup tool confirms you're ordering the exact replacement for your blower.


Ensure your Craftsman leaf blower runs smoothly by replacing worn-out primer bulbs with genuine parts. Buying Craftsman leaf blower primer bulb replacements online is straightforward. Use our model number lookup for model-specific compatibility. We offer same-day shipping to get your blower back in action quickly. The price match ensures you get competitive pricing, and our 365-day return policy offers peace of mind. If your leaf blower won't start or starts then dies, it might be due to fuel blockages caused by an old primer bulb. Replacing the primer bulb can resolve issues of not priming correctly, helping you maintain reliable operation. For further assistance on leaf blower issues, visit our Craftsman leaf blower carburetor primer bulb parts page. Additionally, browse our Leaf Blower Repair Help section for detailed repair guides and troubleshooting solutions.
On Craftsman leaf blowers, look for the model number on a label attached to the main housing near the engine. It may also appear on a label along the shaft, depending on the design. Record every letter, number, and punctuation mark exactly as shown; model numbers can be easy to confuse with serial or engine numbers. Enter that complete model number in the search bar to narrow the catalog to Craftsman leaf blower parts that fit your entire unit, including related parts. This gives you a fast, accurate match and helps avoid ordering parts for a similar blower.

Interior and indicator light bulbs are a straightforward swap that keeps your Craftsman Leaf Blower fully functional. Repair Clinic stocks OEM-spec replacement bulbs along with installation videos for the harder-to-reach spots. Use the model number lookup to confirm the exact bulb specification and heat rating for your unit before you order.

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