Hi guys, my SRX95 has the 12.5 HP Kawasaki and it's started surging and randomly backfiring through exhaust at idle and full throttle. My carburetor skills are absolutely zero so I'm looking for some help, it seems that if you loosen the cover on the air cleaner housing to allow more air in then it smooths right out.
The following is what I've done so far with no improvement:
-new air filter
-new fuel filter
-new spark plug