Question about Briggs & Stratton Briggs Stratton Lawnmower Lawn Mower Short Block
With no load, the key should NOT have sheared. These are possibilities: The replaced key was the wrong size. It should fit TIGHT with no slop at all and be long enough. A second possibility is that the keyway in either the flywheel or the shaft has been damaged. If the edges have been rolled over that would cause a new key to fail. If the flywheel had not been fully seated that would lead to failure. When re-assembling the unit fully cleaning the taper and the bore of the flywheel AND the keyway is important. A very thin lubricant is needed to insure full mating of the part. Torquing the retaining nut to the specified torque is important and this can be a bit tough. gently tapping the wheel to make sure it is seated can help. At this point disassemble and inspect the parts for damage or gauling that would prevent the taper from seating properly and dress the parts lightly with emery if the surfaces have been damaged. Make sure replacement key fits tight and is the right one.
Posted on May 23, 2011
When you shear a key is can damage the key way and roll the lip check that to make sure it is ok, the key has to set right as will, if it is off it will shear. take your time and make sure there is no play when you put the flywheel on it has to tight or you'll chase your tail. let me know what you find
Posted on May 25, 2011
Get a case harden flwheel key instead. The manufacturer makes these keys from soft metal so the blade will shear the key off when heitting a tree stump or a large rock.
If you have a beautiful manicured lawn a harden key is right for yours
Posted on May 24, 2011
That's odd the key way shooed be tight with no slack in it make sure the bolt is tight and use lock tight (blue) on the blade on the fly wheel Ware the pull starter same thing the key way must be the right one if there is any slack it will cut it right in half
hope this helps you
Posted on May 23, 2011
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Posted on Jan 02, 2017
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