Bolens Lawn Mower Spark Plug Parts

Bolens Lawn Mower Spark Plugs & Ignition Parts

A fouled or worn spark plug is one of the most common reasons your Bolens mower won't start or runs rough at mid-season. The spark plug ignites fuel in your engine—when it fails, you lose ignition. Repair Clinic stocks genuine OEM spark plugs, boots, and related ignition parts for Bolens walk-behind and riding mowers, all backed by our fit help ensure.

If your Bolens won't turn over, hard-starts, or idles poorly, check these parts first:

• Spark plugs — fouling, gap wear, or carbon buildup prevent ignition
• Spark plug boots — cracked or loose boots break the spark circuit
• Ignition coils — dead coil = no spark, even with a fresh plug
• Air filters — clogged filters lean out the fuel mix and foul plugs faster
• Fuel lines & carburetors — old fuel and varnish make spark plugs work harder

Browse our full selection of Bolens lawn mower parts and enter your model number for exact matches.

Bolens Lawn Mower Spark Plug FAQs

Why does my Bolens mower spark plug keep fouling?

Fouling happens when carbon, oil, or fuel deposits coat the electrode. Common causes: running old gas (varnish clogs the carburetor and richens the mix), a clogged air filter forcing the engine to run wet, or an ignition coil failing and weakening the spark. Start with a fresh spark plug and clean air filter. If fouling returns immediately, your carburetor or coil likely needs attention.

How do I find my Bolens mower's model number?

Look for the model number stamped or stickered on the mower frame—usually near the engine, under the seat on riders, or on the side panel of walk-behinds. Write it down and use it to find exact spark plug specs and OEM cross-references. Bolens mowers often share engines with MTD and Yard Machines, so knowing your model prevents mismatches.

What's the difference between a spark plug and a spark plug boot?

The spark plug is the part that screws into the cylinder head and creates the spark. The boot is the rubber cap on the ignition coil wire that connects to the spark plug—it insulates and delivers voltage. A cracked boot will arc internally and steal spark energy, causing hard starts even if your plug is good. Always inspect both.

Can I use any spark plug in my Bolens lawn mower?

No—spark plugs must match your engine's heat range and thread size, or you risk damage and poor performance. Bolens mowers run various small engines (Kohler, Briggs & Stratton, Tecumseh), each with specific plug specs. Use your model number to order the correct OEM part. We help ensure fit or your money back.

Order Bolens Lawn Mower Spark Plug Replacement Online

Keep your Bolens lawn mower running efficiently by replacing a faulty spark plug 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 Bolens lawn mower spark plug is failing — showing symptoms like reduced performance, unusual noise, or complete non-operation — replacement is typically the fastest fix. Browse our full library of Bolens repair resources for troubleshooting guides and installation videos.

Bolens Lawn Mower Model Number: Where to Look

Bolens typically places the model number on a label near the engine or on the mower's frame. On a walk-behind mower, check the side panel or deck; on a riding mower, look under the seat, around the rear fender, or along the frame below the steering column. Record the complete model number, including letters, numbers, and hyphens. Enter it in the search bar to filter the catalog to parts that fit your Bolens mower. This model lookup covers the entire unit, so you can narrow everything from engine and ignition parts to belts, blades, and filters. You order with confidence knowing the fit is right.