Should take a Champion: RC12YC
what is the champion cross reference for a briggs and stratton spark plug 691043
Champion CJ-8
Champion RC12YC
not getting fire 4.75 briggs statton lawn mower
champion rj19lm or just a regular j19lm will work just fine in that engine.
Champion RJ19LM
Champion rj19lm
Rc12yc
RJ19LM champion.
Rc12yc
If you have a different brand spark plug, Champion will have a cross reference. You just need the number from the plug. If you do not have that, you will need the model number from the engine. Briggs and Stratton built a LOT of engines with customizations that may use several different spark plugs. 342 cc is simply not enough information.
The Briggs and Stratton 594056 spark plug is commonly cross-referenced with the Champion RJ19LM and the NGK BPR6ES spark plugs. These alternatives are compatible replacements that can be used in various Briggs and Stratton engines. Always ensure to check the manufacturer's specifications to confirm compatibility with your specific engine model.