Pull Cord Not Pulling Or Snatching Back - Briggs & Stratton 500 Series Maintenance Manual

Engine Model: Briggs & Stratton

7 Pull Cord Not Pulling or Snatching Back

QUICK TROUBLESHOOTING GUIDE:
Problem:
Pull cord will not
pull
Cord snatches
back
A: The OPC lever must be held fully in to the main handle before the pull cord
can be pulled and the engine can run. If the OPC lever is fully engaged and
the cord will only pull out 4" or so, see C below.
B: Remove the grassbox. Now remove the HT lead (spark plug cap) for safety
reasons, then lift the front wheels until the handles reach the ground at the
rear. Free any grass caught between the blade and the deck. Stand the
mower back on the ground on all four wheels, replace the cap on the
sparkplug and start in the normal way.
C: Hydraulic Lock occurs if the mower has been tilted forwards and oil settles
between the piston and cylinder head, sticking the piston to the cylinder roof.
Remove and clean the spark plug completely. ONLY USE A GENUINE
SPARKPLUG SPANNER. Do not replace the plug yet.
If the cord will not pull free, tilt the mower BACKWARDS, reach underneath
and turn the blade (in either direction) to free it. Clear any grass blockage.
With the sparkplug removed, prime the engine 6 times with the primer
button, hold in the OPC lever 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 might
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 cloth.
For best practice, only to tip your mower BACKWARDS.
Page 20 of 32 B&S Classic, 450 and 500 Series Selfhelp
Classic,
450 and 500 Series
Likely Cause:
•
OPC not engaged
•
Grass caught between
the blade and the deck
•
"Hydraulic lock"
•
Blade rotation is impeded
•
Blade is unbalanced or
damaged
Solution:
•
Hold OPC in (see A)
•
Remove grass from the
blade (see B)
•
Remove oil from cylinder
(see C)
•
Free blade (See D)
•
(See E) and refer to dealer
Guide 2011, Issue 1.0