Briggs doesn't publish engine compression specs, but 120 is good. 100 is okay. 80 is lousy.
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.
You don't repair compression rings you replace them.
Yes
The valve clearance for a Briggs and Stratton 406777 engine is typically set to 0.004 to 0.006 inches for both the intake and exhaust valves when the engine is at top dead center on the compression stroke. It's important to adjust the clearance when the engine is cold to ensure accurate measurements. Always refer to the specific service manual for your engine model for the most precise information.
0.004 - 0.006"
cawl sistem
The valve clearance on a Briggs and Stratton 21 HP OHV engine is typically set to 0.005 inches for both the intake and exhaust valves when the engine is cold. It's important to check the specific model's service manual for any variations or specific adjustments. Proper valve clearance ensures optimal engine performance and longevity.
http://www4.briggsandstratton.com/miscpdfs/RNT/Engine%20Specifications%20Chart_ms3992.pdf
.004-.006
0.006"
The valve clearance for a 22 hp Briggs & Stratton engine typically ranges from 0.005 to 0.007 inches (0.127 to 0.178 mm) for both the intake and exhaust valves. It's important to refer to the specific engine model's manual for precise specifications, as there may be slight variations based on the engine type or configuration. Proper valve clearance ensures optimal engine performance and longevity.
The compression would be low as there is a compression release valve that runs off of the camshaft to make starting easier......I would say no more than 60 psi after several strong pulls.......in trade school the instructors explained that small engine mechanics cannot really do compression tests on these engines..........