Engine Model:
Briggs & Stratton
Classic,
450 and 500 Series
Page
8 of 32 B&S Classic, 450 and 500 Series Selfhelp
Guide 2011, Issue 1.0
CHANGING ENGINE OIL
Check the engine oil before each use.
These small four stroke engines hold up to 0.6 litres of
oil (1.2 Pints). Any oil shortages can cause premature
wear or serious damage to the engine. So too will using
the incorrect grade of oil. NB Wipe the dipstick, then
fully replace/withdraw it to gain an accurate reading.
Mountfield MX855 four stroke oil is readily available
through either the B&Q chain of retailers or through our
own comprehensive dealer network.
If you are unable to obtain the correct oil, use either an
SAE30 or a 10W-30 grade of oil. These oils are
generally only found in the larger DIY stores in the
gardening department or at a garden centre or
lawnmower specialist
The oil should be changed on all new engines after
approximately 5 hours of operation. It should then be
changed every 50 hours of operation, or once a season.
Before changing the oil, run the engine for a few
minutes to warm the engine oil. This allows it to run
more freely and to carry out any sediment with it.
Engine Oil
•
Mountfield MX855
•
SAE30 lawnmower oil
•
10W-30 oil
Oil capacity is 0.5 litre
for 450 Series engines,
other engines 0.6 litre
Mountfield MX855 four stroke oil
is readily available through
either the B&Q chain or through
our own dealer network.
Option 1….this is
the more
convenient method
for these engines
To drain oil from the oil fill tube, run the engine to warm the
oil. Remove the H.T. lead and grass catcher assembly.
Undo the oil fill dip stick and make sure a suitable tray is in
place to catch the oil. Tilt the machine
backwards onto the
rear left wheel (the wheel closest to the oil fill)
so that
three wheels will be clear of the ground. As the angle
increases the oil will pour out of the fill and into the tray.
Once completed, stand the machine on level ground and refill
in accordance with the operating instructions.
Option 2….
these engines have a square recessed
drain bolt beneath the cutter deck which a
3
/
8
” square
socket extension bar fits. Drain bolts are beside the
main crankshaft (blade shaft). On power drive
machines a black plastic guard protects the belt.
Inside is a small recess with the oil drain bolt at the
top. Turn the drain bolt anti-clockwise to release.
Please dispose of old fuel and used engine oil in
a manner that is compatible with the
environment
