Generally, at the right front corner, just follow the 1/4'" diameter black wire to the cap concealing it. If this a newer engine, it is probably an RC-12YC or equivalent. Remove the cap carefully as it will often tend to stick to the plug.
.03
.30 gap for craftsman 3.5
0.030"
Rj19lm or j19lm
1/2 an inch
.030
Spark plug gap should be .025 http://store.chainsawr.com/
To replace the muffler on a Craftsman zero-turn mower with a 42-inch cut, first ensure the engine is off and cool. Disconnect the spark plug to prevent accidental starting. Remove any mounting bolts or clamps securing the old muffler, then detach it from the engine. Install the new muffler by securing it with the bolts or clamps, reconnect the spark plug, and check for proper alignment before starting the mower.
To replace the blade belts on a Craftsman Kohler Pro mower, first, disconnect the spark plug for safety. Then, remove the deck by unbolting it from the mower chassis. Next, locate and remove the old belts from the pulleys and idlers, noting their routing. Finally, install the new belts by following the same routing, reattach the deck, and reconnect the spark plug before testing the mower.
Your Craftsman lawn mower may not stay on due to issues such as a clogged carburetor, dirty air filter, old spark plug, or low oil levels. It is recommended to check and address these potential problems to keep your lawn mower running smoothly.
Not sure how to answer your question with the right answer. However, lawn mower spark plugs come in three sizes: 5/8, 3/4 and 13/16.
.030"