Charging Unit And Component; Checking The Lighting Coil (Stator Assembly); Checking The Rectifier Regulator - Yamaha F150A Service Manual

5. Check that the vapor shut-off valve
opens and the negative pressure is
released when the battery leads are
connected to the vapor shut-off valve
terminals.
Connect the battery leads to the vapor
shut-off valve terminals for only a few sec-
onds.
6. Remove the special service tool.
7. Measure the resistance between the
vapor shut-off valve terminals.
Vapor shut-off valve resistance:
30.0–34.0 Ω at 20 °C (68 °F)
8. Install the vapor shut-off valve, and then
connect the vapor shut-off valve coupler.

Charging unit and component

Checking the lighting coil (stator
assembly)
1. Disconnect the lighting coil coupler "a".
2. Connect the special service tool "1".
1
a
Charging unit and component
3. Measure the lighting coil output peak
voltage between all combinations of the
connectors. Replace the stator assembly
if below specification.
TIP:
When measuring the lighting coil output peak
voltage under the cranking (unloaded) condi-
tion, remove the clip from the engine shut-off
switch to prevent the engine from starting.
1
Test harness (3 pins) "1": 90890-06847
Lighting coil output peak voltage:
Green (G)–Green (G)
r/min
Cranking
DC V
4. Measure the lighting coil resistance.
Lighting coil resistance (reference data):
0.2–0.3 Ω at 20 °C (68 °F)
5. Disconnect the special service tool, and
then connect the lighting coil coupler.

Checking the Rectifier Regulator

Do not connect the battery cables in
reverse. Otherwise, the Rectifier Regula-
tor could be damaged.
1. Disconnect the Rectifier Regulator cou-
pler "a".
5-19
a
G
Unloaded
1500
11.0 50.0
1
G
G
3500
110.0