I keep beaking fly wheel key on just turning engine off. I was told to det the valves then I have 3 new fly wheel keys, Have already replaced flywhell eith nre, altenator and mowed on time, Moter ran beter than when I purchased it udrd for last summer. HELP me adjust
Is it an OHV engine? If so they would be loctaed above the piston head on your mower.
Yes They Do
You adjust the tappet. That's the thingy that pushes the valve down.
Want to watch the rather "neat" YouTube video? Take the link at the bottom!
I dont know what it is set on
The Briggs & Stratton Model 40H777 typically features a 21.0 cubic inch (344 cc) V-twin engine. These engines are part of the Vanguard series, known for their durability and performance in commercial applications. They often come with features like a dual-element air filter, a cast-iron cylinder sleeve, and overhead valves for improved efficiency and power output.
Watch this video on YouTube. It will tell you how step by step. http://www.youtube.com/watch?v=NjzX-PUjKmo
Mainly, the difference is that in an overhead cam engine, the camshaft is mounted on the head of the engine, and the valves are still overhead, in an overhead valve engine (sometimes called a "pushrod motor"), the camshaft is in the crankcase.
This video will show you how: http://www.youtube.com/watch?v=NjzX-PUjKmo
To adjust the valves on a White lawn tractor with a Briggs & Stratton 25.5HP overhead valve engine, first ensure the engine is cool and remove the spark plug for safety. Rotate the engine to top dead center (TDC) on the compression stroke and check the clearance between the rocker arm and the valve stem. The typical valve clearance specification for this engine is usually around 0.005 inches for both intake and exhaust valves. Use a feeler gauge to adjust the clearance by loosening the lock nut and turning the adjustment screw, then re-tighten the lock nut once the desired clearance is achieved.
A 4-cycle engine that has the intake and exhaust valves located in the cylinder head.
For a 20 HP twin Briggs & Stratton engine, the valve specifications typically include a valve clearance of around 0.005 to 0.007 inches for the intake and 0.007 to 0.009 inches for the exhaust valves when cold. The engine usually features a flathead or overhead valve design, with both intake and exhaust valves made from durable materials to withstand high temperatures. Specific dimensions and tolerances can vary by model, so it's essential to refer to the engine's service manual for precise specifications.