In many product descriptions I'm seeing 8.5tp engines as replacements for 5.5hp engines.
0.030
Valves 21 hp Briggs and Stratton Intek V Twin can be adjusted by increasing the torque on screw band with a right rotation. This can eliminate some leaking problems.
0.030"
Try this site: http://outdoorpowerinfo.com/repairs/
Even though an Intek is not shown, it would be the YouTube video below.
48 oz oil capacity
try .030 unless it is an Intek OHV and then 0.020"
how to Change oil on a Briggs and Stratton 6.75 HP
48 oz
12.5 hp Briggs And Stratton blows fuse when u crank it
220 in-lbs
120 is nominal