EngineMan
Lawn Addict
Actually the Y designates the plug as one of the new Pro-V line. That line replaced the older Commercial Series plugs. Same heat range as the regular plug...
Are you sure because I got it off the NGK spark plug chart, and that the two main plugs for the BRIGGS & STRATTON ENGINES are BR2-LM and the BCPR5ES
Will have to ask NGK sales rep when I see him...!