Inspection Of Ignition Coils; Inspection Of Alternator - TOHATSU MFS25 Service Manual

3) Inspection of Ignition Coils

1. Remove ignition coil coupler.
2. Measure ignition coil resistance. Replace if other than
specified value.
This test can be made without removing parts.
Ignition Coil Resistance :
Primary Coil : Between Black/White (B/W) - Black (B)
0.17 to 0.23 Ω (at 20°C)
Secondary Coil : Between High Tension Cord - Black (B)
3.3 to 4.9 Ω (at 20°C)
Secondary Coil : Between Plug Cap - Black (B)
7.1 to 11.1 Ω (at 20°C)
3. Install plug cap onto high tension cord by entwisting
clockwise.
4. Connect plug cap to spark plug.

4) Inspection of Alternator

1. Disconnect alternator coupler (6 pin).
2. Measure alternator resistance. Replace if other than
specified value.
This test can be made without removing parts.
Alternator (Exciter Coil) Resistance :
Between White/Red (W/R) - White/Black (W/B) : 11 to 16 Ω
Between White/Blue (W/L) - White/Black (W/B) : 11 to 16 Ω
Alternator (ECU Charge Coil) Resistance :
Between White (W) - White (W) : 1.1 to 1.7 Ω
(Three Types)
25/30 2006
2
1
1 Alternator (3 Pin) (Charge Coil)
2 Alternator (6 Pin) (Exciter Coil, ECU Charge Coil)
8
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