Owner’s Manual &
Installation Instructions
Revision 6e
Page 34
Electrical System – Instrumentation
The MV10 is shipped with the following instrument sending units from the factory. The
signals from these senders will be wired per standard industry practice within the 9 pin
engine/boat interface connector as described in the previous section. These senders will
work with all Livorsi or any other Livorsi compatible gauge(s).
Senders:
Water Temperature:
Indicates the temperature of the engine coolant. The range of the
water temperature gauge which must be installed is 100 to 240º F.
Oil Temperature:
Indicates the temperature of the engine oil. The range of the oil
temperature gauge which must be installed is 100 to 320º F.
(see
Fuel Injection System, 550 and 625 models without return to tank fuel,Figure 12, item J
)
Oil Pressure:
Indicates the pressure of the engine oil. The range of oil pressure gauge
which must be installed is 0 to 100psi.
(see
Fuel Injection System, 550 and 625 models without return to tank fuel,Figure 12, item
I
)
Tachometer:
Indicates the engine speed. For the MV10 the tachometer rev range
should be at least 0 to 6000 RPM. The tachometer must be compatible with 2.5 pulses
per engine revolution (5V square wave).
Optional Instrumentation
Hour Meter:
This indicates the amount of time that the engine has run. The MV10
maintenance schedules are based on the number of hours used.
Fuel Pressure Tap:
If a fuel pressure gauge is to be installed in the boat a fuel
pressure tap location can be found on the right side of the fuel/water cooler
(see
Fuel
Injection System, 550 and 625 models without return to tank fuel, figure 12, item B
)
. Replace pipe
plug with suitable sender for the fuel pressure gauge. Also, the Schrader valve found on
the fuel rail can be used as a fuel tap location. When using the Schrader valve location,
be sure to bleed excess air or hard starting may result.
Water Pressure Tap:
Also found on the fuel/oil cooler is a location for water pressure
measurement
(see
Fuel Injection System, 550 and 625 models without return to tank fuel,Figure 12,
item G
)
. Again, replace zinc plug with a suitable sending unit for the water pressure
gauge.
