Can u tell wot fitts a ryobi plt-3043yn spark plug and gap please.

you should be Googling this yourself, check the model number on the spark plug then google the spec or "spark gap".... that would've been quicker than asking this question.

.025" gap

Hi Brian:
Best you tell me what machine and the plug make and ID
Then I'll use google to look up the specified gap.
OR
you could do that yourself.

Free manual online at the internet link shown below:

https://www.manualslib.com/manual/1389229/Ryobi-Plt-3043yw.html

Ryobi PLT 3043YW Operation Manual

No need to gap from a new spark plug unless the plug was dropped on the electrode.

Hi and welcome to FixYa, I am Kelly.
The spark Plug Gap is 0.030. Any original or aftermarket spark plug for this unit is pre-set to 0.030. Unless you dropped the replacement plug it should be fine. All Ryobi engines 2 and 4 cycle have a 0.030 spark plug gap.
Thanks for choosing FixYa,
Kelly

The correct gap according to my RY64400 operators manual is .025 and the torque is 170-190 inch lbs. The spark plug is NGK CMR7A or Champion RZ7C.

I had this problem twice in the past. I solved it the first time by replacingthe plug and setting the plug gap with a feeler guage. The next time it was a decoke of the cylinder (squirting through the plug hole) replacing the plug and leaving it overnight and then cleaning the air filter. It runs like a dream and has worked in Australia, Europe and the UK with no further problems. Also the fule mix has to be just right, I actually use 22:1 instead of 25:1 and do not use any petrol / gas with additives in (like Shell).

Ryobi RY60511A
Champion plug RCJ6Y - gap is .22
I have original manual.

Check the spark plug and sheck the gap on it then check the wire