What spark plug does a Craftsman lawn mower use?
Replacement Plug
The Craftsman 4.5hp mower uses either a Champion model RJ19LM or J19LM spark plug, or equivalent, with the gap set at .
Keeping this in view, how do I know which spark plug 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.
| Replacement Part Type | Briggs & Stratton Spark Plug Part Number | Spark Plug Gap |
|---|---|---|
| Extended Life Series® OHV Spark Plug Platinum (Replaces Champion RC12YC) | 696202 5066 (5066D, 5066H) | .030” |
| Resistor Spark plug - hotter spark (Replaces Champion RC14YC) | 496018S 5092 | .030” |
| Resistor | 692051 | .020” |
Then, can I use any spark plug for lawn mower?
The spark plugs in both types of engine work on the same basic principle. ... Some automotive and lawn mower spark plugs may be interchangeable, but many others are not because of physical differences.
Do lawn mower spark plugs come pre gapped?
Check the gap on the new spark plug before installing it. A new plug will often come pre-gapped to match your specific engine, but use a spark plug gauge to verify that it matches the manufacturer's specifications.
