It needs at least 70 psi to run.
scotts intek 6.5 starter cord replace
SAE 30
0.030
To check the compression reading on a Briggs & Stratton 18 HP Intek engine, you'll need a compression gauge. Remove the spark plug, insert the gauge into the spark plug hole, and crank the engine several times to get a reading. A healthy engine typically shows compression values between 90 to 120 psi, but values can vary based on specific engine conditions and wear. If the reading is significantly lower, it may indicate issues such as worn rings, valves, or a blown head gasket.
For a Briggs & Stratton Intek engine "PH8170"
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"
Even though an Intek is not shown, it would be the YouTube video below.
Try this site: http://outdoorpowerinfo.com/repairs/
120 is nominal
48 oz oil capacity
try .030 unless it is an Intek OHV and then 0.020"