According to the manual, it is 0.030
Robert
You can cross reference a RC12PYP3 or RC12YC non-platinum spark plug for a Briggs 696798. The Briggs Platinum 696798 spark plug is for a snow blower. Part number 696020 for a Platinum plug from Sears is an equivalent also.
Spark Plug gap is .025
.020
Spark plug gap should be .025 http://store.chainsawr.com/
0.030"
Bmr6a
0.65mm
anywhere between 16 and 18 on a spark plug gauge should work fine.
The Sear's website recommends spark plug number DJ7Y, but the brand is not listed.
http://www.toro.com/home/customercare/interactivemanuals.html Snowthrowers Single Stage Snowthrower TOC Maintenance Spark Plug Conditions Page down to Replacing a Spark Plug
.030"
.03