Craftsman Lawn Mower Primer Bulb Replacement

Craftsman Lawn Mower Carburetor & Primer Bulb Parts

When your Craftsman mower won't start or runs rough, the carburetor and primer bulb are your first suspects. A clogged carburetor starves the engine of fuel, while a failed primer bulb means no fuel reaches the cylinder—both are common seasonal issues. Repair Clinic stocks genuine OEM Craftsman carburetors, primer bulbs, and fuel system parts that fit your exact model.

Don't let fuel system problems sideline your mower mid-season. Our parts come with confidence—they're engineered to Craftsman specifications and backed by our parts warranty. Find your part below, or use your model number to locate the exact fit.

• Carburetor won't prime: Primer bulb cracked or fuel lines loose
• Rough idle or stalling: Carburetor varnish buildup or clogged jets
• Hard cold starts: Failed primer bulb or cracked fuel line
• No fuel delivery: Damaged primer bulb or carburetor gasket failure
• Fuel leaks: Carburetor bowl gasket or float needle worn out

Browse our selection of Craftsman lawn mower parts or enter your model number above to find the right replacement.

Craftsman Lawn Mower Carburetor & Primer Bulb FAQs

Why won't my Craftsman mower start even after I prime it?

If priming isn't working, the primer bulb itself may be cracked or the fuel line between the tank and carburetor may be loose or deteriorated. Check that fuel flows when you squeeze the bulb. If it feels spongy with no resistance, replace it. Also inspect the carburetor inlet tube—if it's disconnected or kinked, fuel won't reach the engine.

How do I find my Craftsman lawn mower model number?

Your model number is on a decal typically located on the frame or deck underneath the mower, or sometimes on the handle. It's usually a series of numbers like 917.xxxxx or 580.xxxxx. Snap a photo if the decal is faded—we can help you locate the right parts. Having the exact model number ensures you get a carburetor and primer bulb that fit perfectly.

Can I clean my carburetor instead of replacing it?

Light cleaning can help with varnish buildup, but if the carburetor has internal damage, corrosion, or the float needle is stuck, replacement is your best option. OEM Craftsman carburetors are affordable compared to the time spent troubleshooting, and you'll avoid repeated starting problems throughout the season.

What's the difference between a Craftsman carburetor and aftermarket brands?

Genuine OEM Craftsman carburetors are engineered to your mower's fuel delivery specs and air-fuel ratio. Aftermarket carburetors may fit but often require jetting adjustments or adapter kits. Repair Clinic stocks the exact OEM part your mower was built with—it'll start easier and run cleaner right out of the box.

Order Craftsman Lawn Mower Carburetor Primer Bulb Replacement Online

Keep your Craftsman lawn mower running efficiently by replacing a faulty carburetor primer bulb promptly. With same-day shipping on most in-stock items, you'll have your replacement part fast, minimizing downtime. Our model/part number lookup finds the exact OEM part for your unit, and every order is backed by our 365-day return policy and price-match guarantee. If your Craftsman lawn mower carburetor primer bulb is failing — showing symptoms like reduced performance, unusual noise, or complete non-operation — replacement is typically the fastest fix. Browse our full library of Craftsman repair resources for troubleshooting guides and installation videos.

Craftsman Lawn Mower Model Number: Where to Look

On Craftsman lawn mowers, look for the model number on a decal attached to the frame or deck, often underneath the mower. If it's not there, check the handle or engine housing. The full model number may include a series such as 917 or 580, so copy every digit and letter exactly. Enter it in the search bar to filter the complete catalog to parts that fit your Craftsman mower. This model match applies across the unit's associated parts, not just the primer bulb or carburetor. You get parts that fit the first time.