I have a 4 stroke boss ordered, just need to know what the victa shaft length is to get the right briggs. I'm looking a the 850 6hp with either "Crankshaft Extension: 25mm x 3 5/32" Length, Tapped 3/8" - 24, 2 Woodruff Key(s) and 1/4" Keyway" OR "Crankshaft Extension: 7/8" x 3 5/32" Length, Tapped 3/8" - 24, 2 Woodruff Key(s) and 3/16" Keyway"
I'm guessing it's the 7/8" shaft but need confirmation - the engine no is 121Q72-0020 850 Professional Series
