Search
It is very important to properly tighten spark plugs after replacement or cleaning – especially on small engines with aluminum heads. This table gives approximate torque values for different sizes of spark plugs in both cast iron and aluminum heads.
If you plan to do much work on lawn/garden or grounds maintenance equipment, you need a torque wrench. Even a job as simple as changing a spark plug on a small engine should be done with a torque wrench.
The LSU AgCenter and the LSU College of Agriculture