120 is nominal
Briggs doesn't publish engine compression specs, but 120 is good. 100 is okay. 80 is lousy.
briggs doesn't offer compression ratings for their engines. I will usually pull it 3 to 5 times and look for 90 to 120. anything less is a problem and if it doesn't hold compression there is a problem
any where from 120 lbs to 180 lbs
Any thing above 130 lbs
90 to 120 minimum in 3 to 5 revolutions of the motor
Good compression for a 10.5 hp Briggs and Stratton engine typically falls within the range of 90 to 120 psi. Compression values can vary based on the engine's condition and age, but readings below 90 psi may indicate potential issues such as worn piston rings or valves. It's important to ensure that the engine is at operating temperature and that the spark plug is removed when measuring compression for accurate results. Regular maintenance can help maintain optimal compression levels.
I just got 110 - with new rings but still doesn't run right. ...
An engine requires gas and spark to fire but it also requires compression and timing. If it has gas and spark, I would check the compression...should be over 100 to run good. If it has good compression then I would check to see if the spark occurs when the compression does. If it doesn't then you probably have a sheared key on the flywheel.
Leak down test : Uses 70lbs pressure to test for leaks around valves and cylinders.
For a Briggs and Stratton 22 hp engine, good compression generally ranges between 90 to 120 psi. Values below this range may indicate wear or damage, while readings significantly above this range could suggest issues such as carbon buildup or valve problems. It's important to check both cylinders for consistency, as significant discrepancies may point to underlying issues. Regular maintenance can help maintain optimal compression levels.
A good quality 30wt is Briggs recommendation
Compression testing is done on engines and it establishes whether the engine has good compression. Good compression is needed for the engine to start easily and run efficiently.