What spark plug does a Craftsman lawn mower use?
The Craftsman 4.5hp mower uses either a Champion model RJ19LM or J19LM spark plug, or equivalent, with the gap set at .
Subsequently, how do I know if my lawn mower spark plug is bad?
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.
In this way, do you need to change spark plug on lawn mower?
Spark plugs aren't meant to last forever. Over time, they wear out, which affects how the mower's engine runs. You should replace this component either every season or every 100 hours of use to ensure your engine stays running smoothly.
What happens if you put the wrong spark plug in your lawn mower?
Spark plugs that are gapped incorrectly can cause an engine to miss, or run erratically, especially during idle. The incorrect spark plug gaps can cause uneven firing of individual spark plugs and delay engine combustion; both of which can cause an engine to miss or idle erratically.
How do I know what spark plug I need for my lawn mower?Spark plugs are typically located on the back or side of a lawn mower engine. Look for a short wire that's about 1/4-in. -thick leading to the top of a short, cylindrical protrusion from the engine. If you're not sure where the spark plug is, consult your owner's manual.
How much does it cost to service a lawn mower?On average, lawn mower repairs cost
|National average cost||$90|
|Low-end cost range||$45-$75|
|High-end cost range||$125-$250|