insTAllATiOn direcTiVe
65
MAY 2006
N45 MNA M10
N67 MNA M15
Sensor to detect the presence of water in fuel
(N45 MNT M10.00-N67 MNT M15.00)
Fuel resistivity sensor, integrated with the control and amplifi-
cation electronic circuit, providing the signal for the indicator
of the presence of water in the fuel.
Operating voltage
from 12V to 24 V
Condition in the absence of water open circuit
Closed condition
resistance of the liquid
≤
1 M
Ω
Operating temperature
from - 20 °C to +80 °C
connections of the sensor detecting the presence of water
in fuel
1. M Connector of the engine wire harness -
2. Sensor detecting the presence of water in the fuel -
3. Wiring harness (outfitter’s responsibility).
The three pole connection between the sensor for detect-
ing the presence of water in the fuel and the engine wire
harness must be produced by the outfitter according to the
position of the fuel pre-filter in the boat.
Connection to the engine wire harness requires a METRI-
PACK 150 three-pole connector with three male terminals;
connection to the sensor requires a JUNIOR TIMER three-
pole connector with three female terminals.
Figure 5
Figure 54
A
B
C
3
1
2
A
B
C
3
1
2
3
1
2
04_239_N
04_253_N
CAUTION
in order to enable the proper working of the sensor to
detect water in the fuel, it is necessary that the pre-filter
support is connected electrically to the negative battery
terminal.
In the engine models which use parts with insulated poles
it is necessary to electrically insulate the pre-filter support
from the boat mass and then connect the support with the
negative battery terminal.
High coolant temperature sensor
Switching coolant temperature sensor, providing the signal
for the related indicator.
Operating voltage
from 6 V to 24 V
Condition at ambient temperature
normally open
Closing temperature
100 ± 3 °C
Poles
isolated
04_313_N
Figure
