Leak down test : Uses 70lbs pressure to test for leaks around valves and cylinders.
any where from 120 lbs to 180 lbs
Briggs doesn't publish engine compression specs, but 120 is good. 100 is okay. 80 is lousy.
Any thing above 130 lbs
The exact location of the compression release mechanism in a 17hp Briggs and Stratton engine can vary depending on the specific model and design of the engine. Typically, the compression release mechanism is located near the camshaft or valve train assembly of the engine. It may involve additional components such as springs, levers, or pins that interact with the exhaust valve to temporarily release compression during the starting process.
Briggs and Stratton does not release specific compression values. Anything above 120 psi should be just fine, around 90-100 and you're most likely due for a rebuild. A better test is a leakdown test, with can help in determining where compression is being lost.
Try 32 thousands, to start, depends on how much compression the engine has at this point.
If it is a horizontal crankshaft the gap is .030 if it is a vertical crankshaft it is .020
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
0.030 is the gap for briggs and stratton 4.5 hp mower
I just got 110 - with new rings but still doesn't run right. ...
You can get that info on the Briggs and Stratton website. Just go to: http://www.ereplacementparts.com/briggs-and-stratton-parts-c-16758.html?gclid=CPCZj4vGr58CFZdM5Qodp3bDsA and enter your engine model number.
Where is the location of the idle screw on the Briggs and Stratton 6.0 engine mulcher mower?