Craftsman 919.678250 - Manual (Page 59)

4. Parts which are scored or broken because an engine was
operated with insufficient or contaminated lubricating oil,
or an incorrect grade of lubricating oil (check oil level daily
or after every 8 hours of operation. Refill when necessary
and change at recommended intervals.) Read "Owner’s
Manual.”
5. Repair or adjustment of associated parts or assemblies
such as clutches, transmissions, remote controls, etc.,
which are not manufactured by Briggs & Stratton.
6. Damage or wear to parts caused by dirt, which entered
the engine because of improper air cleaner maintenance,
re-assembly, or use of a non-original air cleaner element
or cartridge. (At recommended intervals, clean and re-oil
the Oil-Foam® element or the foam pre-cleaner, and
replace the cartridge.) Read “Owner's Manual.”
7. Parts damaged by overspeeding, or overheating caused
by grass, debris, or dirt, which plugs or clogs the cooling
fins, or flywheel area, or damage caused by operating the
engine in a confined area without sufficient ventilation.
(Clean fins on the cylinder, cylinder head and flywheel at
recommended intervals.) Read “Owner’s Manual.”
8. Engine or equipment parts broken by excessive vibration
caused by a loose engine mounting, loose cutter blades,
unbalanced blades or loose or unbalanced impellers,
improper attachment of equipment to engine crankshaft,
overspeeding or other abuse in operation.
9. A bent or broken crankshaft, caused by striking a solid
object with the cutter blade of a rotary lawn mower, or
excessive v-belt tightness.
10. Routine tune-up or adjustment of the engine.
11. Engine or engine component failure, i.e., combustion
chamber, valves, valve seats, valve guides, or burned
starter motor windings, caused by the use of alternate
fuels such as, liquified petroleum, natural gas, altered
gasolines, etc.
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