Ignition System, Ignition Control System; Inspection Of Ignition Sparks; Inspection Of Plug Cap - TOHATSU MFS25 Service Manual

Electrical System

4. Ignition System, Ignition Control System

1) Inspection of Ignition Sparks

1. Disconnect plug caps from spark plugs.
2. Connect plug cap to spark tester.
3. Connect spark tester clip to spark plug tip electrode.
Spark Tester :
P/N. 3F3-72540-0
Spark Performance :
10 mm (0.4 in) or over
4. Start engine and check sparks. Check spark system when
sparks are weak.
• This test can be made without removing parts.
• Ignition coil operation test can be made by
using "Running (Drop) Test" of diagnosis
system.
• When testing, put electrode cap assuredly
to prevent direct contact with spark
tester wiring and leak of electrical
current, and perform test carefully.
• Keep inflammable gas, fuel, oil and fat
away from tester to prevent them from
catching sparks.

2) Inspection of Plug Cap

Remove plug cap to test it as a separate unit.
1. Disconnect plug caps from spark plugs.
2. Remove plug caps from their high tension cables.
3. Measure plug cap resistance. Replace if other than specified
value.
Plug Cap Resistance :
3.0 to 7.0 kΩ
8-14
WARNING
OK
25/30 2006