Cleaning Spark Plug video
In this video we’ll remove, clean and refit the spark plug. A dirty plug will cause a ton of issues, including: no start; surging; rough running; hot start problems; no power.
You’ll find useful resources on this page, tips, links to tools, parts and supplies required to complete your repair.
A dirty spark plug will cause a ton of problems. It’s a common issue oil, carbon, over fueling issue, or stale gas will cause the plug to foul.
Continuous fouling however is a sign of a problem. Typical causes of continues fouling include: Bad plug; Wrong plug; Too much engine oil; Bad gas; Bad armature (coil); Engine wear; Valve lash out of spec; Faulty carburetor.
Tools & Parts
To nail this procedure you may need the following tools, parts and supplies.
Ratchet Tool Set
Before we can do anything, we'll need tools. I've selected this set as I own some Craftsman tools and while I have worn some out, they did do a lot of work. So I expect this set will last the occasional user quite a long time.
This set carries both metric and standard sockets and that's important, because some mowers will have both type of fastener sizes. Set includes spark plug sockets. Picture links to Amazon.com
Teng 1/2 Torque wrench, fantastic tool I use it every day and mine is still going strong. A torque wrench is advised for tightening components such as flywheel nuts and blades. The torque spec of these components is very important. Picture links to Amazon.com
If you are considering buying a torque wrench, definitely check out my review of Teng torque wrench.