What does oil on lawn mower spark plug mean?
One potential source of oil on your spark plug is a blown piston seal. The seals keep oil from leaking into the combustion chamber and, if blown, can manifest themselves by spraying oil on the spark plug. This is not a user-serviceable part, as it requires an engine rebuild.
Also question is, why is my lawn mower spark plug wet?
Electrodes that have been worn thin are a sign of overheating, often caused by too much ethanol in the gas. If your plug has wet, oily deposits, it's time to take the mower in for servicing, because oil is leaking into the combustion chamber where it shouldn't be.
In this regard, can oil ruin spark plugs?
Oil making its way into the spark plug wells will drastically affect the engines performance, leading to misfires, increased oil consumption and blue exhaust. In extreme cases, it can even lead to an engine fire. If the vehicle is exhibiting any of these symptoms, the spark plugs should be inspected immediately.
Is oil on spark plugs bad?
Finding oil on your spark plugs can mean bad news for your engine, but don't panic yet, as it may not be as bad as you think. As a general rule, oil on spark plugs can be caused by bad valve cover gaskets, worn spark plug o-rings or valve guides, a faulty head gasket or a broken piston ring.Here's How to Know if a Lawn Mower Spark Plug is Bad
- You can't get the engine to fire up at all.
- You have to tug extra hard for longer than usual on the rewind.
- Your lawn mower loses power while moving.
- The gas runs out quicker than it used to.