Ignition System; Troubleshooting Guide - Bosch PB-650 Service Manual

PB-650
PB-750

3 IGNITION SYSTEM

(C)
(B)
(A)
(G)

3-1 Troubleshooting guide

Start
OK
Clean / Regap / Replace
S.T.
spark plug.
Not
OK
Not
Clean /
OK
Regap /
Spark plug
Replace.
OK
Not
Spark OK
Replace.
plug cap/
coil
OK
Not
OK
Ignition
Replace.
switch
OK
Not
Replace
Coil
OK
resist-
ignition
ances
coil.
OK
Not
OK
Leads
Repair /
connections
Replace.
OK OK
IGNITION SYSTEM
(D)
(E)
(G)
(F)
shoe air
OK
S.T.
Not
OK
Flywheel
magnet
OK
S.T.
Not
OK
OK
S.T.
Not
OK
OK
Flywheel
S.T.
Not
OK
Replace ignition coil and / or check other
systems.
OK
S.T.
Not
S.T.: Spark test.
OK
R.T.: Running test including actual cutting.
( A ) Spark plug
( B ) Spark plug cap coil
( C ) Spark plug cap
( D ) Flywheel
( E ) Ignition coil
( F ) Primary lead
(G) Ignition switch
Not Adjust pole shoe air gaps.
Pole
OK
(Check flywheel magnet
at the same time. Go to
gaps
A if OK.)
OK
Not
Replace flywheel.
OK
(Check the key at the same
time. Go to B if OK.)
OK
A
S.T.
Not
OK
Replace.
key
OK
13
Remedy
Check
OK OK
R.T.
Not Not
OK OK
B
OK
R.T.
Not
OK
End