Tighten the blade bolts (P. 3 - 6 ).
• Inspect blades (P. 3 - 6 ).
• Replace blades (P. 3 -4
).
• Check crankshaft runout
(P. 2-13).
Tighten bolts (P. 5 - 2 ).
Blades bent, damaged, or
unbalanced by improper
sharpening.
Engine mounting bolts
loose.
Clean out the mower deck.
Check crankshaft runout
(P. 2-13
).
OK
OK
OK
OK
Blades bolt(s) loose.
Grass and debris lodged
under mower deck.
Readjust to specification
(P. 3-17
).
Maximum engine speed too
high.
OK
OK
Mechanical damage, such
as a bent crankshaft.
Retighten or replace (P. 4- 2).
Adjust (P. 3 -16).
Inspect (P. 3-16). Replace (P. 4 - 2 ).
Inspect (P. 3-16
). Replace (P. 4 - 2 ).
Adjust (P. 3 -16
).
Defective brake plate return spring.
Roto-Stop cable too loose or damaged.
Clutch spring too weak or clutch lining
excessively worn.
Brake lining excessively worn.
Roto-Stop cable too tight or seized.
Blade control lever does not return when
released or its operating force is too soft.
Blade does not turn properly with blade control
lever engaged.
Blade stops turning when beginning to mow;
engine still running.
Blade does not stop turning when blade control
lever is released.
Blade turns when starting engine or continues to
turn with blade control lever released.