Engine Model:
Briggs & Stratton
Classic,
450 and 500 Series
Page
7 of 32 B&S Classic, 450 and 500 Series Selfhelp
Guide 2011, Issue 1.0
3 Routine Engine Maintenance
Regular and careful maintenance is essential to preserve the original
performance and safety level of the engine. Always store the mower in a dry
place.
TESTING FOR A SPARK
(this job requires 2 people)
1. Stand the machine on a firm surface and set the
height adjusters to the lowest setting for added
safety.
2. Remove the H.T. lead (1 in the diagram) – a
push/pull fit.
3. Unscrew the spark plug (2 in the diagram) with a
genuine spark plug spanner.
4. Fit the plug back into the end of the HT Cap and rest
it against the engine block (hold only the black
insulation lead).
5. The second person can now hold in the Operator
Presence Control (OPC) and pull the engine cord.
You should see a spark jump across the end of the
plug.
H.T. Lead (spark plug
cap) and Spark Plug
Spark Plug:
The spark plug gap for all
these Briggs & Stratton
engines should be 0.76mm
or 0.03” (
30
/
1000
).
Champion: LM19 or QJ19LM
DRAINING FUEL:
We advise that the engine should be drained of fuel before storage for more than 30
days. One should only buy fuel in quantities that can be used up within a few weeks.
When emptying the fuel from the engine place the mower on a solid surface, or
patch of gravel or similar (fuel spillage may kill the lawn or stain a patio):
i. Remove the grassbox, remove the fuel cap and tip the mower BACKWARDS to
drain as much of the fuel as possible.
ii. For the fuel which remains in the tank, carefully dip a clean rag into the fuel tank
(do not force it in as you could damage the fuel pick up pipe). Allow the fuel to
soak into the rag to remove it. Repeat this until the old fuel is removed. Arrange
safe disposal of fuel-soaked rags.
Please dispose of old fuel and used engine oil in a manner that is compatible
with the environment
