Section 05 ENGINE MANAGEMENT (DI)
Subsection 03 (COMPONENT INSPECTION AND ADJUSTMENT)
05-03-28 SMR2000-051-05-03A.FM
Secondary Winding
Static Test
NOTE: An ignition coil with good resistance mea-
surement can still be faulty. Voltage leak can occur
at high voltage level which is not detectable with
an ohmmeter. A dynamic test is more effective.
Remove high tension lead from ignition coil.
Using a multimeter, check the resistance between
the terminals C and the coil post.
The resistance should be between 6800 and
10200 Ω at 20°C (68°F).
If not within specification, replace the ignition coil.
Otherwise, perform the Dynamic Test below.
Measure resistance of the high tension leads.
They must be as follows. Otherwise, replace the
lead.
NOTE: It is not necessary to remove the spark
plug cap.
IMPORTANT: Always replace leads with genuine
parts. Otherwise, fuel injection system operation
may be impaired.
Check continuity between ignition coil ground cir-
cuits and engine.
Dynamic Test
Use an ignition coil tester, available from after-market
tool/equipment suppliers.
1. With ignition coil removed from craft, hook high
tension leads from tester to ignition coil high
tension cables.
2. Connect 2 smaller tester leads to primary of ig-
nition coil.
TYPICAL
1. Lead to secondary
2. Leads to primary
3. Turn power switch to 12 volts and you should
observe spark jumping at a predetermined gap
of 7 to 8 mm (.276 to .311 in).
If there is no spark, if it is weak or intermittent, the
coil is defective and should be replaced.
1. MAG side ignition coil at bottom
2. Mag side ignition coil wire on edge of electrical box
3. Edge of electrical box
MODEL SIDE
VALUE
OHM
RX DI
MAG 5700
PTO 4300
GTX DI
MAG 5700
PTO 4900
WARNING
Do NOT use coil tester on metal work bench.
Follow manufacturer instructions.
WARNING
Always reconnect spark plug cables at the
same spark plugs where they come from. The
cable coming out the edge of the electrical
box must be connected to the MAG side spark
plug. Otherwise, sever backfire may occur
with possible damage to exhaust system
components. The white tape on the ignition
coil should match the white tape on the high
tension cable.
F12H0UA
1
2
F12R0UB
132
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