MTD Engine - Series 350/450/650
11
5.57. If further investigation is required, remove the
recoil assembly, as described in the STARTER
SERVICE section of this manual.
See Figure 5.57.
5.58. Lift the fan shroud off of the studs that locate it.
5.59. Visually trace the wire from the stop switch to the
spade terminal on the module, and inspect the
wire for any damaged insulation or potential con-
tact with ground.
5.60. Unplug the wire from the spade terminal on the
module, and check continuity to ground from the
female spade terminal on the wire. Resistance
(Ohms) should approach zero with the bail
released. See Figure 5.60.
Figure 5.57
Fan shroud
Mounting posts for
engine cover
Studs for recoil assembly
Figure 5.60
Safety bail in OFF
position, Module
primary windings
are grounded
5.61. Resistance (Ohms) should be infinite (O.L) with
the bail depressed. See Figure 5.61.
5.62. If the switch and wire work properly, and the con-
nection is good at the spade terminal, but releas-
ing the bail fails to stop the engine, then the
problem lies within the module.
5.63. Blade: A sharp, balanced, and well secured
blade is important.
5.64. A dull blade will bludgeon the grass rather than
cutting it.
• This results in poor cut quality because the
grass is torn rather than cut, and the additional
drag can pull-down engine RPMs when the
mower is near the limits of its capacity.
• A dull blade makes the engine work harder,
increasing operating temperature and fuel con-
sumption, while decreasing engine life.
• A dull blade, in combination with other abuse
issues may constitute abuse, voiding the war-
ranty.
Figure 5.61
Safety bail in RUN
position, Module
primary windings
not grounded
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