Ignition And Ignition Control System; Checking The Ignition Spark Gap; Checking The Spark Plug Cap (With Resister Type); Checking The Spark Plug Cap - Yamaha 55DEHD Service Manual

Ignition and ignition control sys-
tem

Checking the ignition spark gap

1. Disconnect the all spark plug caps from
the all spark plugs.
2. Connect a spark plug cap to the special
service tool.
Ignition tester: 90890-06754
3. Crank the engine and check for a spark.
If there is no spark. Check the ignition
system.
Ignition tester: 90890-06754
w
9 Do not touch any of the connections of
the ignition tester leads.
9 Keep flammable gas or liquids away,
since this test can produce sparks.
6885J11
Electrical component / Ignition and ignition control system

Checking the spark plug cap

(with resister type)
1. Check the spark plug caps. Replace the
spark plug caps if cracked or damaged.
2. Remove the spark plug cap 1 from the
spark plug wire 2 by turning the cap
counterclockwise.
3. Measure the spark plug cap resistance.
Replace the spark plug cap if out of spec-
ification.
68880060
1
Spark plug cap resistance:
4.0–6.0 kΩ at 20°C (68°F)
1
2
3
2
6B480080
4
5
6
69R80060
7
8
9
8-4