would depend on what motor and HP - Briggs & Stratton? check the number on the spark plug and see what the standard gap is for that plug. Most all plugs are pre-gapped when you buy them. But most small Briggs & Stratton plugs are gapped at 30 thousands ( 0.030 )
.030
Spray some ether in the carb. If it fires, it has spark, but not getting fuel. start there.
Champion RDJ7Y is the correct number.
.030" Champion RJ19LM or J19LM for manual, go to: http://www.disruptit.com/manuals/L0020135.pdf
.03
.30 gap for craftsman 3.5
0.030"
Rj19lm or j19lm
No, not all lawn mower spark plugs are the same. Different lawn mowers may require different types or sizes of spark plugs to function properly. It is important to use the correct spark plug recommended by the manufacturer for your specific lawn mower model.
According to Craftsman owner manual for 4.75 horsepower mower model 917.388920 spark plug RJ19LM the gap is .030. Also: Oil type (API SG-SL) SAE 30 (above 32 F) and SAE SW-30 (below) 32 deq. F Blade bolt torque 35-40 lbs.
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.
Spark Plug gap is .025