What is the type of spark plug and gap

SOURCE: Craftsman 21'' Lawn mower won't start

In order for there to be a spark at the plug, make sure the plug is grounded to the engine, it will not "fire" if it isn't.

Remove the cover with the crankrope, there should be a thin black wire going to the coil, going to a ground lug that kills the engine. Try unplugging this wire and re-check the fire...if it fires, there is a fault in this wire and should be replaced. The mower will run without it, but will not stop without "choking" out the engine

SOURCE: Where is the spark plug located on the craftsman

CLICK HERE for a blowout diagram of your engine.
I have colored the sparkplug wire red.



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Curtis Sewell

• 7482 Answers
• Posted on May 26, 2010

SOURCE: craftsman briggs and stratton 6.50 190cc lawn

Sounds like you will need to clean your carburetor.
Sometimes you can get by with priming it a few times, and letting it
run a few times like that and it will flush the gunk out of the jets,
but most of the time you will need to rebuild the carburetor.
If the mower is over a couple years old, then I also recommend that you
buy and install a new carburetor repair kit, because the diaphragm will
get hard and that will cause it to be hard to crank.
When you clean your carburetor and remove the jet screws, count the
number of turns it takes to seat the jets from their original position.
That way when you go to put the jets back in, you know how many turns
they were in/out.
Please do not forget to rate me, Thanks
Good Luck, I hope this helped

SOURCE: what is the spark plug for a 6.75 hp craftsman

I have the same mower, the gap, according to the product specs. is .030 inches.