"Bought this plug during a tune up of a 5hp Briggs & Stratton mower. I got an unbelieveable difference! Way more power. I have a mulching mower and with thick grass I used to have to knock the grass out of the mower and go over it several times. Not any longer. And now I can mow my front and back lawns together 2, 2 1/2 times before refueling, instead of every time. The only draw back I found was the design of the nut. My mower is very compact, and it was somewhat difficult to tighten the plug because the nut is very narrow, and didn't allow a good purchase of the socket."
Pros: Power, fuel efficient
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