The Ignition System And The Ignition Control System; Inspection Of The Ignition Spark; Inspection Of The Plug Cap - TOHATSU MFS 25D Service Manual

Electrical System
4. The Ignition System and the
Ignition Control System

1) Inspection of the Ignition Spark

• When testing, install the electrode cap
p ro p e r l y s o a s t o p re v e n t l e a k s a n d
contact with the wiring of the spark
tester, and perform the test carefully.
• Keep flammable gas, fuel, and oils away,
because testing generates sparks.
1. Disconnect the plug cap from the spark plug.
2. Connect the plug cap to a spark tester.
3. Connect the spark tester clip to the spark plug tip
electrode.
Spark Tester:
P/N. 3F3-72540-0
Spark Performance:
10 mm (0.4 in) or greater
4. Start the engine and check the spark. Check the ignition
system if the sparks are weak.
• This test can be conducted without removing
the part.
• T h e i g n i t i o n c o i l o p e r a t i o n t e s t c a n b e
conducted using the "Running (Drop) Test" of
the diagnosis system.

2) Inspection of the Plug Cap

Remove the part to test it as a separate unit.
1. Disconnect the plug cap from the spark plug.
2. Remove the plug cap from the high tension cable.
3. Measure the plug cap resistance. Replace it if the value is
not as specified.
Plug Cap Resistance:
8-20
WARNING
4st 25/30 2022