Stihl MS 461 - Wiring Harness; Testing; Ground Wire

46 MS 461, MS 461-R
If slot (arrow) is worn, install a new
flywheel.
Make sure the key engages the slot
(arrow) in the flywheel.
– Set air gap between ignition
module and flywheel, b 7.2
– Reassemble all other parts in the
reverse sequence.
7.6 Wiring Harness
The ground and short circuit wires
are combined in a wiring harness.
7.6.1 Testing
If the spark plug, ignition lead and
spark plug boot are in order, check
the short circuit wire.
– Remove the rewind starter,
b 8.2
3443RA201 TG
: Pull the short circuit wire (1) out
of the cable retainer (2).
: Remove the connector (3).
: Connect the ohmmeter to
ground (4) and the short circuit
wire (1).
– Set the Master Control lever to
"0".
The resistance measured must be
about 0 Ω. If it is much higher, the
reason is a break and the wiring
harness has to be replaced, b 7.6
– Set the Master Control lever to
"F".
The resistance measured must be
infinitely high. If not, replace the
wiring harness, b 7.6
Perform the contact and continuity
test on the ground wire too.
If the ground wire is damaged, the
wiring harness must be replaced.
– If no fault can be found, check the
ignition system with the aid of the
troubleshooting chart, b 7.7
: Fit short circuit wire terminal (3)
with its crimped side facing the
ground wire.
3443RA206 TG
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4
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3
: Push the short circuit wire (1) into
the retainer (2), making sure it is
not under tension
– Connector tag and flat
receptacle must be positioned
parallel to the edge of the ignition
module.
The loop in the short circuit wire (1)
is between the crankcase and
ignition module cable retainer.
: Push the short circuit wire (1) into
the guide (2) – the protective
tube (3) must butt against the rib
(arrow).
– Reassemble in the reverse
sequence.
7.6.2 Ground Wire
A faulty ground wire may impair or
prevent operation of the short circuit
wire.
The ground wire is combined with
the short circuit wire in a wiring
harness. If damaged, the complete
wiring harness must be replaced.
– Check ground wire for contact
and continuity,
replace wiring harness if
necessary.
3443RA202 TG
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2
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