Engine Model:
Briggs & Stratton
Classic,
450 and 500 Series
Page
16 of 32 B&S Classic, 450 and 500 Series Selfhelp
Guide 2011, Issue 1.0
B:
This is a general indication that the mower has been over-filled with oil, or
tipped incorrectly (perhaps inadvertently). It can be resolved without the
intervention of a service dealer.
Remove the air filter assembly from above the primer
bulb. It is held by a long screw (flat bladed
screwdriver required). Once the screw has been
removed, lift the air filter assembly about 5mm and
draw it from underneath the engine cover.
Split the two halves of the air filter unit and remove
the foam from within. If very oily, squeeze the
sponge into some kitchen roll to remove any excess
oil. Then, clean the sponge in hot soapy water, Dry
it thoroughly, then work one tablespoon of oil into the
sponge so that it is sticky to the touch. Re-install the
air filter.
Never cut grass with the air filter
assembly removed
Remove and clean the spark plug completely. ONLY USE A GENUINE
SPARKPLUG SPANNER.
With the sparkplug removed, prime the engine with the primer bulb 10
times, hold in the OPC and pull the engine over with the pull cord 6 times to
eject any oil from the spark plug hole.
Replace the plug and start the engine in the normal way. The engine will
smoke quite badly at first, but allow the engine to continue running for at
least ten minutes. The smoke will begin to dissipate. Let the mower run
until the smoke has gone.
NB During subsequent uses (for maybe a further 8-10 hours) the mower may
smoke a little. Droplets of oil may come from the exhaust onto the deck as
the oil is cleared from the cylinder. Simply wipe these away with a rag.
The correct way to tip your mower is BACKWARDS.
