New 3100 series B & S single 17.5 HP comes with a 5066 platinum B & S spark plug. I find no definite cross reference, but I am guessing Autolite platinum APP3224 or APP3226 or Champion regular plug RC12 YC or RC14YC. Anyone know for sure? Your help is appreciated!
B & S 5066 cross reference help....Thanks!
- Thread starter Cmarti
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