I like NGK but I'm sure some of my saws have other brands. As long as the heat range is right and they work I'm happy.
Yes Lower number runs hotterbosch Ws7f in my 77 for 14 years no problem . . That's like well over 150 cord of wood.
So what's the deal lower the number the hotter the plug . ? 77 has bocsh ignition also.
Woodblocker55
NGK's are excellent Plugsbpmr7a just easy for me to remember...
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