Engine Model:
Briggs & Stratton
Classic,
450 and 500 Series
Page
15 of 32 B&S Classic, 450 and 500 Series Selfhelp Guide 2011, Issue 1.0
5 Engine Starts and Smokes Heavily
QUICK TROUBLESHOOTING GUIDE:
Problem: Likely Cause: Solution:
White, blue or
grey smoke from
exhaust
• Over-filled with oil
• Mower has been tipped incorrectly
Reduce oil (see A)
• Remove oil from
cylinder (see B)
A: Do not overfill the engine with oil.
These 4-stroke engines hold up to 0.6 litres of
oil (1.2 Pints). NB Wipe the dipstick, then fully
replace/withdraw it to gain an accurate reading.
Easiest way to drain excess oil (from oil-fill
tube):
Run the engine a few minutes 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 closest to the oil fill (three wheels will
be clear of the ground). As the angle increases
the oil will pour from the fill and into the tray.
Drain excess oil, and make sure the level of oil
in the tank does not show above the MAX mark
on the dipstick.
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 2: These engines have a square
recessed drain bolt beneath the cutter deck
which a
3
/
8
” square socket extension bar fits.
The drain bolt is 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.
Now follow the instructions in B below.
Please dispose of old fuel and used engine oil in a manner that is compatible
with the environment
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