You might have weakened the bolt, causing it to shear when you run the engine
For a 3.5 hp Briggs and Stratton engine, the torque setting for the connecting rod bolts is typically around 200 to 220 inch-pounds. It's essential to follow the manufacturer's specifications for the specific engine model, as torque values can vary. Always ensure that you use a calibrated torque wrench for accurate measurements during assembly.
It is generally caused by improper valve adjustment. But can be caused by excessive RPM. On the 17.5 the intake push rod is most often the one bent or broke. Try idling down the engine prior to turning it off.
To remove the choke knob on a Briggs and Stratton engine, first, ensure the engine is off and cool. Locate the choke knob, which is typically attached to a lever or rod. Depending on the model, you may need to unscrew a retaining nut or simply pull the knob off if it's designed to slide off. Be cautious not to damage any connected components during the removal process.
Take off the air cleaner and cover. There will be a rod attached to the throttle arm. Locate that rod and follow it back to what will most likely look something like a lever extending out from the engine block. That is the external portion of the governor. There are also gears and a counterweight inside the engine that act in conjunction with the external parts.
The torque specification for the Briggs & Stratton engine model 311777-0154-E1 typically varies depending on the specific component being installed, such as the cylinder head or connecting rod. For the cylinder head, the recommended torque is usually around 20-25 ft-lbs. It’s important to consult the engine's service manual for precise torque settings and procedures to ensure proper assembly. Always use a calibrated torque wrench for accurate measurements.
The most common reason would be the ignition coil is bad. The worst reason would be a broke rod, but you should be able to a rattle inside the engine where the broken part is knocking!
The qualified answer is yes. Understand that the connecting rod will break at the wrist pin at 5500-6000 RPMs. An OHV engine will probably damage the valve train prior to that happening. You do not state your reasoning for wanting to know.
Three specs are considered critical; the connecting rod cap at 110 in-lbs, the sump cover at 110 in-lbs and the cylinder head at 165 in-lbs.
The correct answer to this is it is a 206cc, was a 13 cubic inch, to confirm this if you look in one of the corners of the head, on the outside, it will be stamped with a 13, showing it is a 5hp engine. If the engine was torn down you could look on the stroke area of the rod and on one side its stamped with the mold number, and the other side with the cubic inch of the engine, which would be a 13.
rod tensile failure
A bad engine rod is an engine rod that has misbeheaved.