ELECTRICAL AND ECU
Air Heater Components and Functions
12-14
6LY3 Service Manual
© 2007 Yanmar Marine International
Heater plugs
(Figure 12-21, (1))
are available for
this engine as an aid to starting in cold weather.
The heater plugs are installed on top of the
intercooler
(Figure 12-21, (3))
to heat the charging
air and facilitate easier engine starting. The heater
plugs are automatically controlled by the ECU
(Engine Control Unit)
(Figure 12-18, (1))
through
the coolant temperature sensor.
When setting the starter switch to ENGINE ON, the
heater plug automatically turns on for 30 seconds
when the coolant temperature is 10°C (50°F) or
less.
After the engine starts, the heater plug stays on for
a maximum of 10 minutes or until the coolant
temperature reaches 45°C (113°F). The heater
plugs then cut off.
Figure 12-20
Figure 12-20
Figure 12-21
Figure 12-21
1 – Heater Plug
2 – Seal
3 – Intercooler
Heater Plug Specifications
Part No.
119575-77050
Rated Current
58A
Rated Voltage
DC 11V
Tightening Torque
25 N·m (18.4 lb-ft) or less
40
3
0
20
10
0
-5°C
0°C
5°C
10°C
15°C
25°C
(2
3
°F) (
3
2°F) (41°F) (50°F) (59°F) (77°F)
Cool
a
nt Temper
a
t
u
re
Pre-He
a
t Time
(
s
econd
s
)
0006
3
55
(1)
(2)
(3)
00062
8
4
